0000950170-23-011305 | 10-K | XBRL Viewer

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Document and Entity Information - USD ($) $ in Billions	12 Months Ended
Document and Entity Information - USD ($) $ in Billions	Jan. 31, 2023	Mar. 24, 2023	Jul. 31, 2022
Cover [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Jan. 31, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Trading Symbol	AMBA
Entity Registrant Name	AMBARELLA, INC.
Entity Central Index Key	0001280263
Current Fiscal Year End Date	--01-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		39,581,559
Entity Public Float			$ 2.5
Entity File Number	001-35667
Entity Tax Identification Number	98-0459628
Entity Address, Address Line One	3101 Jay Street
Entity Address, City or Town	Santa Clara
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	95054
City Area Code	408
Local Phone Number	734-8888
Entity Incorporation, State or Country Code	E9
Title of 12(b) Security	Ordinary Shares, $0.00045 Par Value Per Share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Document Annual Report	true
Document Transition Report	false
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	San Jose, California
Auditor Firm ID	238
Documents Incorporated by Reference	Certain information is incorporated into Part III of this report by reference to the Proxy Statement for the Registrant’s annual meeting of shareholders to be held on or about June 8, 2023 to be filed with the Securities and Exchange Commission pursuant to Regulation 14A not later than 120 days after the end of the fiscal year covered by this Annual Report on Form 10-K.

Consolidated Balance Sheets - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Current assets:
Cash and cash equivalents	$ 113,541	$ 171,043
Marketable debt securities	93,322	0
Accounts receivable, net	51,987	44,307
Inventories	40,486	45,219
Restricted cash	8	10
Prepaid expenses and other current assets	5,288	6,169
Total current assets	304,632	266,748
Property and equipment, net	11,814	10,134
Deferred tax assets, non-current	19,276	15,340
Intangible assets, net	58,497	46,302
Operating lease right-of-use assets, net	8,339	11,127
Goodwill	303,625	303,625
Other non-current assets	4,012	4,269
Total assets	710,195	657,545
Current liabilities:
Accounts payable	17,845	31,170
Accrued and other current liabilities	56,655	52,064
Operating lease liabilities, current	3,539	3,391
Income taxes payable	4,112	1,245
Deferred revenue, current	1,311	1,414
Total current liabilities	83,462	89,284
Operating lease liabilities, non-current	5,097	8,322
Other long-term liabilities	15,548	12,763
Total liabilities	104,107	110,369
Commitments and contingencies (Note 15)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at January 31, 2023 and January 31, 2022, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized; 39,043,000 and 37,302,818 shares issued and outstanding at January 31, 2023 and January 31, 2022, respectively	18	17
Additional paid-in capital	572,076	447,287
Accumulated other comprehensive loss	(492)	0
Retained earnings	34,486	99,872
Total shareholders’ equity	606,088	547,176
Total liabilities and shareholders' equity	$ 710,195	$ 657,545

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jan. 31, 2023	Jan. 31, 2022
Statement of Financial Position [Abstract]
Preference shares, par value	$ 0.00045	$ 0.00045
Preference shares, shares authorized	20,000,000	20,000,000
Preference shares, shares issued	0	0
Preference shares, shares outstanding	0	0
Ordinary shares, par value	$ 0.00045	$ 0.00045
Ordinary shares, shares authorized	200,000,000	200,000,000
Ordinary shares, shares issued	39,043,000	37,302,818
Ordinary shares, shares outstanding	39,043,000	37,302,818

Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Income Statement [Abstract]
Revenue	$ 337,606	$ 331,856	$ 222,990
Cost of revenue	128,672	123,724	87,417
Gross profit	208,934	208,132	135,573
Operating expenses:
Research and development	204,946	167,337	140,759
Selling, general and administrative	78,244	70,438	55,980
Total operating expenses	283,190	237,775	196,739
Loss from operations	(74,256)	(29,643)	(61,166)
Other income, net	3,318	1,002	3,863
Loss before income taxes	(70,938)	(28,641)	(57,303)
Provision (benefit) for income taxes	(5,552)	(2,230)	2,483
Net loss	$ (65,386)	$ (26,411)	$ (59,786)
Net loss per share attributable to ordinary shareholders:
Basic	$ (1.70)	$ (0.72)	$ (1.72)
Diluted	$ (1.70)	$ (0.72)	$ (1.72)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	38,363,638	36,577,120	34,679,717
Diluted	38,363,638	36,577,120	34,679,717

Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Statement of Comprehensive Income [Abstract]
Net loss	$ (65,386)	$ (26,411)	$ (59,786)
Other comprehensive income (loss), net of tax:
Net unrealized gains (losses) on investments	(492)		451
Reclassification of unrealized gains (losses) on investments		(1,219)
Other comprehensive income (loss), net of tax	(492)	(1,219)	451
Comprehensive loss	$ (65,878)	$ (27,630)	$ (59,335)

- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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+ Details

Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands	Total	Outstanding Ordinary Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Beginning Balance, Amount at Jan. 31, 2020	$ 448,072	$ 15	$ 261,220	$ 768	$ 186,069
Beginning Balance, Shares at Jan. 31, 2020		33,805,609
Issuance of shares through employee equity plans, Shares		1,584,619
Issuance of shares through employee equity plans, Amount	15,684	$ 1	15,683	0	0
Issuance of shares through employee stock purchase plan, Amount	5,825		5,825
Issuance of shares through employee stock purchase plan, Shares		182,931
Stock repurchase, Amount	(1,000)	$ 0	(1,000)	0	0
Stock repurchase, Shares		(25,719)
Stock-based compensation expense	65,730	$ 0	65,730	0	0
Other comprehensive income (loss) - net of tax	451	0	0	451	0
Net loss	(59,786)	0	0	0	(59,786)
Ending Balance, Amount at Jan. 31, 2021	474,976	$ 16	347,458	1,219	126,283
Ending Balance, Shares at Jan. 31, 2021		35,547,440
Issuance of shares through employee equity plans, Shares		1,636,596
Issuance of shares through employee equity plans, Amount	12,195	$ 1	12,194	0	0
Issuance of shares through employee stock purchase plan, Amount	$ 7,208		7,208
Issuance of shares through employee stock purchase plan, Shares		118,782
Stock repurchase, Shares	0
Fair value of partially vested equity awards assumed in connection with acquisition	$ 407	$ 0	407	0	0
Stock-based compensation expense	80,020	0	80,020	0	0
Other comprehensive income (loss) - net of tax	(1,219)	0	0	(1,219)	0
Net loss	(26,411)	0	0	0	(26,411)
Ending Balance, Amount at Jan. 31, 2022	$ 547,176	$ 17	447,287	0	99,872
Ending Balance, Shares at Jan. 31, 2022	37,302,818	37,302,818
Issuance of shares through employee equity plans, Shares		1,635,596
Issuance of shares through employee equity plans, Amount	$ 11,409	$ 1	11,408	0	0
Issuance of shares through employee stock purchase plan, Amount	$ 6,636		6,636
Issuance of shares through employee stock purchase plan, Shares		104,586
Stock repurchase, Shares	0
Stock-based compensation expense	$ 106,745	$ 0	106,745	0	0
Other comprehensive income (loss) - net of tax	(492)	0	0	(492)	0
Net loss	(65,386)	0	0	0	(65,386)
Ending Balance, Amount at Jan. 31, 2023	$ 606,088	$ 18	$ 572,076	$ (492)	$ 34,486
Ending Balance, Shares at Jan. 31, 2023	39,043,000	39,043,000

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Cash flows from operating activities:
Net loss	$ (65,386)	$ (26,411)	$ (59,786)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	19,934	14,007	11,967
Amortization (accretion) of premium (discount) on marketable debt securities, net	(683)	1,034	721
Stock-based compensation	111,158	87,801	70,134
Deferred income taxes	(3,936)	(4,426)	(514)
Other non-cash items, net	(751)	(509)	65
Changes in operating assets and liabilities:
Accounts receivable	(7,680)	(18,600)	(6,487)
Inventories	4,733	(18,944)	(3,110)
Prepaid expenses and other current assets	153	228	(537)
Other non-current assets	978	832	1,141
Accounts payable	(13,325)	9,822	6,214
Accrued and other current liabilities	5,225	(1,954)	12,055
Income taxes payable	2,867	83	272
Deferred revenue	1,012	(131)	144
Operating lease liabilities	(4,011)	(3,608)	(2,416)
Other long-term liabilities	(6,195)	(429)	937
Net cash provided by operating activities	44,093	38,795	30,800
Cash flows from investing activities:
Acquisition, net of cash acquired	0	(307,038)	0
Purchases of investments	(97,437)	(118,726)	(219,677)
Sales of investments	2,444	208,132	70,087
Maturities of investments	2,000	107,760	123,208
Purchase of tangible and intangible assets	(15,051)	(9,679)	(4,942)
Escrow claim associated with business acquisition	749	0	0
Net cash used in investing activities	(107,295)	(119,551)	(31,324)
Cash flows from financing activities:
Stock repurchase	0	0	(1,000)
Proceeds from exercise of stock options and employee stock purchase plan	10,585	15,292	16,417
Long-term financing payment for intangible assets	(4,887)	(4,767)	(5,021)
Net cash provided by financing activities	5,698	10,525	10,396
Net increase (decrease) in cash, cash equivalents and restricted cash	(57,504)	(70,231)	9,872
Cash, cash equivalents and restricted cash at beginning of period	171,053	241,284	231,412
Cash, cash equivalents and restricted cash at end of period	113,549	171,053	241,284
Supplemental disclosure of cash flow information:
Cash paid for income taxes	1,444	1,869	1,531
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 16,410	$ 1,569	$ 4,302

Organization and Summary of Significant Accounting Policies

12 Months Ended

Jan. 31, 2023

Accounting Policies [Abstract]

Organization and Summary of Significant Accounting Policies

1. Organization and Summary of Significant Accounting Policies

Organization

Ambarella, Inc. (the Company) was incorporated in the Cayman Islands on January 15, 2004. The Company is a leading developer of low-power semiconductor solutions offering high-definition (HD) and Ultra HD compression, image processing, and powerful deep neural network processing. The Company combines its processor design capabilities with its expertise in video and image processing, algorithms and software to provide a technology platform that is designed to be easily scalable across multiple applications and enable rapid and efficient product development. The Company’s system-on-a-chip, or SoC, designs fully integrate high-definition video processing, image processing, artificial intelligence (AI) computer vision algorithms, audio processing and system functions onto a single chip. These low power SoCs deliver exceptional video and image quality and can extract valuable data from high-resolution video and radar streams. The Company is currently addressing a broad range of human and computer vision applications, including video security, advanced driver assistance systems (ADAS), electronic mirrors, drive recorders, driver/cabin monitoring systems, autonomous driving, and industrial and robotic applications.

The Company sells its solutions to leading original equipment manufacturers, or OEMs, who include the Company’s SoCs in their products, and original design manufacturers, or ODMs, who include the Company’s SoCs in the products that they supply to OEMs, globally.

Basis of Consolidation

The Company’s fiscal year ends on January 31. The consolidated financial statements of the Company and its subsidiaries have been prepared in conformity with U.S. GAAP. All intercompany transactions and balances have been eliminated upon consolidation.

Use of Estimates

The preparation of consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expense during the reported periods. Actual results could differ from those estimates.

On an ongoing basis, management evaluates its estimates and assumptions, including those related to (i) business combinations; (ii) write downs of excess and obsolete inventories; (iii) the estimated useful lives of long-lived assets; (iv) the valuation of stock-based compensation awards; (v) the realization of tax assets and estimates of tax liabilities, including reserves for uncertain tax positions. These estimates and assumptions are based on historical experience and on various other factors which the Company believes to be reasonable under the circumstances. The Company may engage third-party valuation specialists to assist with estimates related to the valuation of assets and stock awards associated with various contractual arrangements. Such estimates often require the selection of appropriate valuation methodologies and significant judgment. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material.

Concentration of Risk

The Company’s products are manufactured, assembled and tested by third-party contractors located primarily in Asia. The Company does not have long-term agreements with these contractors. A significant disruption in the operations of one or more of these contractors would impact the production of the Company’s products which could have a material adverse effect on its business, financial condition and results of operations.

A substantial portion of the Company’s revenue is derived from sales through one of its distributors, WT Microelectronics Co., Ltd., formerly Wintech Microelectronics Co., Ltd., or WT, which serves as its non-exclusive sales representative in Asia other than Japan, and directly to one ODM customer, Chicony Electronics Co., Ltd., or Chicony. Termination of the relationships with these customers could result in a temporary or permanent loss of revenue. Furthermore, any credit issues from these customers could impair their abilities to make timely payment to the Company. See Note 16 for additional information regarding revenue and credit concentration with these customers.

Financial instruments that potentially subject the Company to concentrations of credit risk consist primarily of cash, cash equivalents, marketable debt securities and accounts receivable. The Company maintains its cash primarily in checking accounts with reputable financial institutions. Cash deposits held with these financial institutions may exceed the amount of insurance provided on such deposits. The Company has not experienced any losses on deposits of its cash. In order to limit the exposure of each investment, the cash equivalents and marketable debt securities consist primarily of money market funds, commercial paper, debt securities of corporations or corporate bonds, asset-backed securities and U.S. government securities which management assesses to be highly liquid. The Company does not hold or issue financial instruments for trading purposes.

The Company performs ongoing credit evaluation of its customers and adjusts credit limits based upon payment history and customers’ credit worthiness. The Company regularly monitors collections and payments from its customers.

Foreign Currency Transactions

The U.S. dollar is the functional currency for the Company and its subsidiaries. Monetary assets and liabilities denominated in non-U.S. currencies are re-measured to U.S. dollars using current exchange rates in effect at the balance sheet date. Nonmonetary assets and liabilities are re-measured to U.S. dollars using historical exchange rates. Monetary and other accounts are re-measured to U.S. dollars using average exchange rates in effect during each period. Gains or losses from foreign currency re-measurement are included in other income, net in the consolidated statements of operations, and, to date, have not been material.

Fair Value of Financial Instruments

Fair value accounting is applied to all financial assets and liabilities and non-financial assets and liabilities that are recognized or disclosed in the financial statements on a recurring basis. The carrying amounts reflected in the consolidated balance sheets for cash equivalents, accounts receivable, accounts payable, accrued liabilities and other current liabilities, approximate fair value due to the short-term nature.

Cash Equivalents and Marketable Debt Securities

The Company considers all highly liquid debt security investments with original maturities of less than three months at the time of purchase to be cash equivalents. Debt security investments that are highly liquid with original maturities at the time of purchase greater than three months are considered marketable debt securities. The Company classifies these investments as “available-for-sale” (AFS) securities.

In accordance with Accounting Standards Update (ASU) No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, the Company estimates the expected losses whenever a security’s fair value is below its amortized cost basis. The expected loss is computed at an individual security level using the discounted cash flow method with the effective interest rate on the purchase date. In the determination of credit-related losses, the Company excludes securities with zero loss expectation such as assets backed by government agencies. There are various factors considered in its assessment of credit-related losses, including the extent to which the fair value is less than the amortized cost basis, adverse conditions related to an industry or an underlying loan obligator, the payment structure of the security, changes to the rating of the security and other factors that may affect the security credit. The credit-related portion of the loss is recognized in other income, net in the consolidated statements of operations but is limited to the difference between the fair value and the amortized cost basis of the security, adjusted for accrued interest. The non-credit-related portion of the loss is recognized in accumulated other comprehensive loss in the consolidated balance sheets.

The Company measures the fair value of money market funds using quoted prices in active markets for identical assets and classifies them within Level 1. The fair value of the Company’s investments in other debt securities are obtained based on quoted prices for similar asserts in active markets, or model driven valuations using significant inputs derived from or corroborated by observable market data and are classified within Level 2. The Company does not have debt securities under unobservable inputs and classified within Level 3.

Restricted Cash

Amounts included in restricted cash represent those required to be set aside to secure certain transactions in a foreign entity. As of January 31, 2023 and 2022, the restricted cash was immaterial, respectively. The following table presents cash, cash equivalents and restricted cash reported on the consolidated balance sheets, and the sums are presented on the consolidated statements of cash flows:


	As of January 31,
	2023		2022		2021
	(in thousands)
Cash and cash equivalents	$	113,541	$	171,043	$	241,274
Restricted cash		8		10		10
Total as presented in the consolidated statements of cash flows	$	113,549	$	171,053	$	241,284

Trade Accounts Receivable and Allowance for Credit Losses

The Company’s accounts receivables are recorded at invoiced amounts less allowance for any credit losses. In arrangements where revenue recognition occurs in advance of invoicing, an unbilled receivable is recorded, less allowance for any credit losses, within accounts receivable, when collection of these unbilled amounts are conditional only on the passage of time. According to ASU 2016-13, the Company recognizes credit losses based on a forward-looking current expected credit losses (CECL). The Company makes estimates of expected credit losses based upon its assessment of various factors, including historical collection experience, the age of accounts receivable balances, credit quality of its customers, current economic conditions, reasonable and supportable forecasts of future economic conditions, and other factors that may affect its ability to collect from customers. The changes in allowance for credit losses are recognized in the consolidated statement of operations. The uncollectible accounts receivables are written off in the period in which a determination is made that all commercially reasonable means of recovering them have been exhausted. There were no material credit losses and write-offs of accounts receivable for the fiscal years ended January 31, 2023, 2022 and 2021, respectively. There was no material allowance recorded as of January 31, 2023 and 2022, respectively.

Inventories

The Company records inventories at the lower of cost or net realizable value. The cost includes materials and other production costs and is computed using standard cost on a first-in, first-out basis. Inventory reserves are recorded for estimated obsolescence or unmarketable inventories based on forecast of future demand and market conditions. Any adjustments to reduce the cost of inventories to their net realizable value are recognized in earnings in the current period. Once inventory is written down, a new accounting cost basis is established and, accordingly, any associated reserve is not released until the inventory is sold or scrapped.

Property and Equipment

Property and equipment are stated at cost and depreciated using the straight-line method over the estimated useful life for computer equipment, computer software, machinery, equipment and furniture and fixtures. Leasehold improvements are amortized over the shorter of the lease term or their estimated useful lives. Repairs and maintenance are charged to expense as incurred.

Intangible Assets

The Company’s intangible assets primarily consist of acquired intangible assets, including developed technology, customer relationships and trade name, as well as software licenses. The acquired intangible assets are amortized over their estimated useful lives.

The Company's in-process research and development, or IPR&D, is initially capitalized at fair value with an indefinite life and amortization commences upon completion of the underlying projects. When a project underlying reported IPR&D is completed, the corresponding amount of IPR&D is reclassified as an amortizable purchased intangible asset and is amortized over its estimated useful life.

The Company accounts for a noncancelable on-premise internal-use software license as the acquisition of an intangible asset and the incurrence of a liability to the extent that all or a portion of the software licensing fees are not paid on or before the license acquisition date. The intangible asset and related liability are recorded at net present value and interest expense is recorded over the payment term. The software license is amortized over its license term.

The Company expenses the cost of purchased software that is to be sold, leased or otherwise marketed as part of a product until the technological feasibility of the product has been established. Once the technological feasibility of the product, to be externally marketed, has been established or where the software has an alternative future use, the Company capitalizes the cost of purchased software until the associated product is available for general release to customers, at which point the capitalized cost is amortized on a product-by-product basis over the remaining estimated economic life of the product.

Leases

In accordance with the Accounting Standards Codification (ASC) Topic 842, Leases, the Company recognizes leases as operating lease right-of-use (“ROU”) assets and corresponding lease liabilities at the lease commencement date based on the present value of future lease payments, while recognizing lease expenses under straight-line method through the lease term. The Company also elected the practical expedient that does not recognize ROU assets and lease liabilities that arise from short-term (12 months or less) leases. The Company does not combine lease components with non-lease components, and as a result, the non-lease components are accounted for separately. In determining the present value of lease payments, the Company uses the implicit interest rate if readily determinable. When the implicit rate is not readily determinable, the Company uses its incremental borrowing rate based on the information available at the lease commencement date. The Company's leases mainly include its worldwide office facilities which are all classified as operating leases. Certain leases include renewal options that are under the Company's discretion. The renewal options are included in the ROU asset and liability calculation if it is reasonably certain that the Company will exercise the option. The Company's finance leases were immaterial as of January 31, 2023 and 2022, respectively.

Business Combination

In the application of purchase accounting in a business combination, the Company allocates the purchase price to the assets acquired and liabilities assumed based on their estimated fair values. The excess of the purchase price over the fair values of the identifiable assets and liabilities is recorded as goodwill. The Company identifies an acquired intangible asset apart from goodwill whenever the intangible asset arises from contractual or other legal rights, or when it can be separately sold, transferred, licensed, rented or exchanged. Intangible assets consist primarily of developed technology, customer relationships and trade name. When determining the fair values of assets acquired and liabilities assumed, especially with respect to the intangible assets, the Company is required to make significant estimates and assumptions. Critical estimates and assumptions used in valuation techniques include, but are not limited to, revenue growth, technology migration curve, customer attrition rate, royalty rates and risk-adjusted discount rates. The estimates are based on historical data, various internal estimates, and external sources that the Company believes to be reasonable upon the acquisition date. Actual results could differ from these estimates under different assumptions or circumstances and such differences could be material.

Goodwill

The Company does not amortize goodwill. The Company tests goodwill for impairment at least annually in the fourth fiscal quarter, or sooner whenever events or changes in circumstances indicate that the asset may be impaired. There is only one single reporting unit for goodwill impairment test purposes based on the Company’s business and reporting structure. The Company is permitted to first assess qualitative factors to determine whether the two step goodwill impairment test is necessary. Further testing is only required if the Company determines, based on the qualitative assessment, that it is more likely than not that the reporting unit’s fair value is less than its carrying amount. Otherwise, no further impairment testing is required. Qualitative factors include industry and market considerations, overall financial performance, and other relevant events and factors affecting the reporting unit. No goodwill impairment has been identified to date based on the Company’s qualitative factors assessment.

Impairment of Long-Lived Assets Excluding Goodwill

The Company reviews property and equipment and intangible assets, excluding goodwill, for impairment at least annually in the fourth fiscal quarter or whenever events or changes in circumstances indicate that the carrying amount of an asset, or asset group, may not be recoverable. Determination of recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset, or asset group to estimated undiscounted future cash flows expected to be generated by the asset, or asset group. If the carrying amount of an asset or asset group exceeds its estimated undiscounted future cash flows, an impairment charge is recognized for the amount by which the carrying amount of the asset or asset group exceeds the estimated fair value of the asset or asset group. Fair value is determined based on the estimated discounted future cash flows expected to be generated by the asset or asset group. Events or changes in circumstances that may indicate that an asset is impaired include significant decreases in the market value of an asset, significant underperformance relative to expected historical or projected future results of operations, a change in the extent or manner in which an asset is utilized, significant declines in the estimated fair value of the overall Company for a sustained period, shifts in technology, loss of key management or personnel, changes in the Company’s operating model or strategy and competitive forces. There has been no occurrence of events or indications to date that would trigger an impairment. As such, no impairment charge has been recognized as of January 31, 2023.

Equity Investment

The Company accounts for its investments in privately held companies as equity investments and reports the investments in other non-current assets in the consolidated balance sheets. The Company chooses to measure these equity investments that do not have readily determinable fair value at cost minus any recorded impairments, adjusted for subsequent observable price changes in transactions for an identical or similar investment of the same issuers. Upon determining that an impairment or observable price change exists, the Company records any adjustment to the fair value of the investment through other income, net in the consolidated statements of operations. To date, there have been no significant changes on the fair value of the investments and the Company did not recognize any impairment losses related to these investments in the fiscal years ended January 31, 2023, 2022 and 2021, respectively.

Revenue Recognition

In accordance with ASC 606, Revenue from Contracts with Customers, the Company recognizes revenue when control of its goods and services is transferred to its customers. Revenue recognition is evaluated through the following five steps: (i) identification of the contract, or contracts, with a customer; (ii) identification of the performance obligations in the contract; (iii) determination of the transaction price; (iv) allocation of the transaction price to the performance obligations in the contract; and (v) recognition of revenue when or as a performance obligation is satisfied.

The sale of semiconductor products accounts for the substantial majority of the Company’s consolidated revenue. Sales agreements with customers are renewable periodically and contain terms and conditions with respect to payment, delivery, warranty, supply and other rights. The Company considers an accepted customer purchase order, governed by sales agreement, to be the contract with the customer. For each contract, the Company considers the promise to transfer tangible products to be the identified performance obligation. Product sales contracts may include volume-based tiered pricing or rebates that are fulfilled in cash or product. In determining the transaction price, the Company accounts for the right of returns, cash rebates, commissions and other pricing adjustments as variable consideration, estimates these amounts based on the expected amount to be provided to customers and reduces the revenue recognized. The Company estimates sales returns and rebates based on the Company’s historical patterns of return and pricing credits. As the Company’s standard payment terms are 30 days to 60 days, the contracts have no financing component. Under ASC 606, the Company estimates the total consideration to be received by using the expected value method for each contract, computes weighted average selling price for each unit shipped in cases where there is a material right due to the presence of volume-based tiered pricing, allocates the total consideration between the identified performance obligations, and recognizes revenue when control of its goods and services is transferred to its customers. The Company considers product control to be transferred at a point in time upon shipment or delivery because the Company has a present right to payment at that time, the customer has legal title to the asset, the Company has transferred physical possession of the asset, and the customer has significant risk and rewards of ownership of the asset.

The Company also enters into various project service agreements with certain customers. These agreements may include multiple performance obligations, such as software development services, licensing of intellectual property and post-contract customer support, or PCS. These multiple performance obligations are highly interdependent, highly interrelated, are typically not sold separately and do not have standalone selling prices. They are all inputs to generate one combined output which is incorporating its SoC into the customer’s product. Accordingly, the Company determines that they are not separately identifiable and shall be treated as a single performance obligation. For fixed-price project service contracts, the Company recognizes revenue either over time as services are provided using an input method based on contract costs incurred to date compared to total estimated contract cost, or at a point in time upon completion and acceptance by the customer, depending on the terms of the arrangement. For project service contracts that are billed at a fixed rate for each hour of service provided, the Company recognizes revenue in the amount for which the Company has the right to invoice as the Company believes the amount invoiced directly corresponds with the value to the customer of its performance completed to date.

Timing of revenue recognition may differ from the timing of invoicing to the Company’s customers. The Company records contract assets when revenue is recognized prior to invoicing. The Company’s contract assets are primarily related to the satisfied but unbilled performance obligations associated with project service agreements at the reporting date. As of January 31, 2023 and 2022, the contract assets for these unbilled receivables were not material, respectively. The Company’s contract liabilities consist of deferred revenue. The deferred revenue is primarily related to the nonrecurring engineering charges that are either invoiced or paid but performance obligations are not satisfied associated with project service agreements. The deferred revenue is expected to be recognized over the period when performance obligations are satisfied. Additionally, the value of unsatisfied, or partially unsatisfied, performance obligations for contracts that are greater than a year was not material as of January 31, 2023 and 2022, respectively. The Company also elects not to disclose the value of unsatisfied or partially unsatisfied performance obligations for contracts with original expected contract duration of one year or less, and elects to exclude amounts collected from customers for all sales taxes from the transaction price.

Cost of Revenue

Cost of revenue includes the cost of materials, such as wafers processed by third-party foundries, costs associated with packaging, assembly, testing and manufacturing support operations, such as logistics, planning and quality assurance, as well as personnel costs (including stock-based compensation) related to project service agreements. Cost of revenue also includes indirect costs, such as inventory valuation reserves, adverse purchase commitments, allocation of facility costs, amortization of developed technology, warranty and other general overhead costs.

Research and Development

Research and development costs are expensed as incurred and consist primarily of personnel costs, product development costs, outside services, costs of development for software and hardware tools, costs and amortization of licensing intellectual property from third parties for product development, costs of fabrication of masks for prototype products, equipment expenses, depreciation of equipment and tools and allocation of facility costs.

Selling, General and Administrative

Selling, general and administrative expenses consist of personnel costs, travel and trade show costs, legal expenses, amortization of trade name and customer relationships, professional services and occupancy costs. Advertising expenses were not material for the fiscal years ended January 31, 2023, 2022 and 2021, respectively.

Stock-Based Compensation

The Company measures stock-based compensation for equity awards granted to employees and directors based on the estimated fair value on the grant date, and recognizes that compensation as expense using the straight-line attribution method for service condition awards or using the graded-vesting attribution method for awards with performance conditions over the requisite service period, which is typically the vesting period of each award. The Company determines the fair value of restricted stock and restricted stock units with service or performance conditions based on the fair market value of its ordinary shares on the grant date. The Company uses the Black-Scholes option pricing model to determine the fair value of stock options. Determining the fair value of stock options on the grant date requires the input of various assumptions, including stock price of the underlying ordinary share, the exercise price of the stock option, expected volatility, expected term, risk-free interest rate and dividend rate. The Company calculates expected volatility based on its own historical stock price for a period commensurate with the expected term, which is computed based on its own historical exercise behavior. The risk-free interest rate is derived from an average of the U.S. Treasury constant maturity rates for the respective periods most closely commensurate with the expected term. The expected dividend yield is zero because the Company has not historically paid dividends and has no present intention to pay dividends. The Company uses the Lattice pricing model and Monte Carlo Simulations to evaluate the fair value of awards with market conditions, including assumptions of historical volatility and risk-free interest rate commensurate with the vesting term. The Company elects to account for forfeitures as they occur.

Income Taxes

The Company records income taxes using the asset and liability method, which requires the recognition of deferred tax assets and liabilities for the expected future tax consequences of events that have been recognized in its financial statements or tax returns. In estimating future tax consequences, generally all expected future events other than enactments or changes in the tax law or rates are considered. Valuation allowances are provided when necessary to reduce deferred tax assets to the amount expected to be realized.

The Company applies authoritative guidance for the accounting for uncertainty in income taxes. The guidance requires that tax effects of a position be recognized only if it is “more likely than not” to be sustained based solely on its technical merits as of the reporting date. Upon estimating its tax positions and tax benefits, the Company considers and evaluates numerous factors, which may require periodic adjustments and which may not reflect the final tax liabilities. The Company adjusts its financial statements to reflect only those tax positions that are more likely than not to be sustained under examination.

As part of the process of preparing consolidated financial statements, the Company is required to estimate its taxes in each of the jurisdictions in which it operates. The Company estimates actual current tax exposure together with assessing temporary differences resulting from differing treatment of items, such as accruals and allowances not currently deductible for tax purposes. These differences result in deferred tax assets, which are included in the consolidated balance sheets. In general, deferred tax assets represent future tax benefits to be received when certain expenses previously recognized in the consolidated statements of operations become deductible expenses under applicable income tax laws, or loss or credit carryforwards are utilized.

In assessing whether deferred tax assets may be realized, the Company considers whether it is more likely than not that some portion or all of deferred tax assets will be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income.

The Company makes estimates and judgments about its future taxable income based on assumptions that are consistent with its plans and estimates. Should the actual amounts differ from estimates, the amount of valuation allowance could be materially impacted. Any adjustment to the deferred tax asset valuation allowance would be recorded in the consolidated statements of operations for the periods in which the adjustment is determined to be required.

Net Income (Loss) Per Ordinary Share

Basic earnings (losses) per share is computed by dividing net income (loss) available to ordinary shareholders by the weighted-average number of ordinary shares outstanding during the period. Diluted earnings (losses) per share is computed by dividing net income (loss) available to ordinary shareholders by the weighted-average number of ordinary shares outstanding during the period increased to include the number of additional ordinary shares that would have been outstanding if the potentially dilutive securities had been issued. Potentially dilutive securities include outstanding stock options, shares to be purchased under the Company’s employee stock purchase plan and unvested restricted stock units. The dilutive effect of potentially dilutive securities is reflected in diluted earnings (losses) per share by application of the treasury stock method.

Comprehensive Loss

Comprehensive loss includes unrealized gains or losses from available-for-sale securities that are excluded from net loss.

Recent Accounting Pronouncements

Although there are several new accounting pronouncements issued by the FASB in fiscal year 2023, the Company does not believe any of these accounting pronouncements had or will have a material impact on its consolidated financial statements.

Business Combination

12 Months Ended

Jan. 31, 2023

Business Combinations [Abstract]

Business Combination

2. Business Combination

The Company did not enter into any business combination agreements during the fiscal years ended January 31, 2023 and 2021. The Company acquired the following business during the fiscal year ended January 31, 2022 which was accounted for as a business combination:

On November 5, 2021, pursuant to a merger agreement, the Company completed the 100% voting rights acquisition of Oculii Corp., or Oculii, a privately-held Ohio-based company that develops adaptive radar perception algorithms for automotive, including advanced driver assistance systems, autonomous vehicle driving systems and other commercial applications, for a total purchase consideration of $355.7 million. As a result, there was $277.0 million attributed to goodwill, $32.8 million attributed to intangible assets and $45.9 million attributed to net assets acquired. The Company also assumed all of the unvested options to purchase Oculii capital stock that were held by continuing Oculii service providers, subject to customary adjustments with respect to the exercise price and number of shares underlying such options. The acquisition-related costs included in selling, general and administrative expense in the consolidated statements of operations were approximately $3.8 million in fiscal year 2022.

The aggregate purchase consideration has been allocated as follows:


	Amount
	(in thousands)
Cash consideration transferred	$	355,071
Net working capital adjustment		247
Fair value of stock-based compensation awards attributable to pre-combination services		407
Total purchase consideration	$	355,725

The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition:


	Acquisition Date
	Fair Value
	(in thousands)
Cash and cash equivalents	$	48,032
Accounts receivable		733
Inventories		194
Prepaid expenses and other current assets		134
Property and equipment		155
Intangible assets		32,800
Goodwill		277,024
Other non-current assets		34
Total assets acquired		359,106
Accounts payable		223
Accrued and other current liabilities		2,193
Deferred income tax liability, non-current		965
Total liabilities assumed		3,381
Total purchase consideration	$	355,725

Goodwill is primarily attributable to expected synergies for the combined operations and the assembled workforce acquired and is assigned to the Company’s sole reportable segment.

Below is a summary of intangible assets acquired in the acquisition:


	Acquisition Date		Estimated
	Fair Value		Useful Lives
	(in thousands)
Trade name (1)	$	2,500	7 years
Customer relationships (2)		13,200	9 years
Developed technology (1)		17,100	7 years
Total intangible assets acquired	$	32,800

_____________

(1)

The fair values of trade name and developed technology were determined by applying the Relief-from-Royalty Method under the income approach.

(2)

Customer relationships represent the fair value of the existing relationships using the Multi-Period Excess Earnings Method.

The finite-lived intangible assets will be amortized over the estimated useful lives based on the pattern in which the economic benefits are expected to be received to the cost of revenue and operating expenses and have a weighted average useful life of 7.8 years.

Pro Forma Information (Unaudited)

The following table presents unaudited pro forma information as if the acquisition of Oculii had occurred on February 1, 2020. The unaudited pro forma information for the periods indicated includes adjustments for non-recurring transaction costs, amortization of intangibles arising from the acquisition, stock-based compensation expense and the related income tax effects. The unaudited pro forma financial information is not necessarily indicative of the results of operations that would have occurred had the acquisition been effected on February 1, 2020. In addition, these results are not intended to be a projection of future results and do not reflect events that may occur after the acquisition, including but not limited to revenue enhancements, cost savings or operating synergies that the combined entity may achieve as a result of the acquisition.


	Pro Forma Year Ended
	January 31, 2022			January 31, 2021
	(unaudited, in thousands)
Revenue	$	333,323		$	223,497
Net loss	$	(35,330	)	$	(78,644	)

Approximately $0.5 million of revenue and $6.1 million of net loss attributable to Oculii since the acquisition date of November 5, 2021 was included in the consolidated statements of operations for the fiscal year ended January 31, 2022.

Financial Instruments and Fair Value

12 Months Ended

Jan. 31, 2023

Investments, All Other Investments [Abstract]

Financial Instruments and Fair Value

3. Financial Instruments and Fair Value

In the second quarter of fiscal year 2023, the Company resumed its investments in money market funds and debt securities after a full liquidation of its investments in fiscal year 2022 to finance the acquisition of Oculii. The debt security investment portfolio consists of commercial paper, debt securities of corporations or corporate bonds, asset-backed securities and U.S. government securities. All of the investments are denominated in United States dollars and reported at fair value as available-for-sale securities in the consolidated balance sheets as follows:


	As of January 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	7,872	$	—	$	—		$	7,872
Commercial paper		18,333		—		—			18,333
Corporate bonds		23,472		50		(224	)		23,298
Asset-backed securities		18,753		44		(149	)		18,648
U.S. government securities		33,256		22		(235	)		33,043
Total cash equivalents and marketable debt securities	$	101,686	$	116	$	(608	)	$	101,194

	As of January 31, 2022
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	20	$	—	$	—		$	20
Total cash equivalents and marketable debt securities	$	20	$	—	$	—		$	20

As of January 31, 2023, there were no money market funds or debt securities with unrealized losses for more than twelve months.


	As of
	January 31, 2023		January 31, 2022
	(in thousands)
Included in cash equivalents	$	7,872	$	20
Included in marketable debt securities		93,322		—
Total cash equivalents and marketable debt securities	$	101,194	$	20

The contractual maturities of the investments at January 31, 2023 and 2022 were as follows:


	As of
	January 31, 2023		January 31, 2022
	(in thousands)
Due within one year	$	48,016	$	20
Due in 1-5 years		52,414		—
Due in 5-7 years		764		—
Total cash equivalents and marketable debt securities	$	101,194	$	20

The unrealized gains and losses on the available-for-sale securities were primarily caused by fluctuations in market value and interest rates as a result of the economic environment. In accordance with ASU No. 2016-13, Financial Instruments-Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, the Company estimates the expected losses at an individual security level whenever a security’s fair value is below its amortized cost basis using the discounted cash flow method. The credit-related portion of the loss is recognized in other income, net in the consolidated statements of operations but is limited to the difference between the fair value and the amortized cost basis of the security, adjusted for accrued interest. The non-credit-related portion of the loss is recognized in accumulated other comprehensive loss in the consolidated balance sheets. The credit-related losses were not material for the fiscal years ended January 31, 2023, 2022 and 2021, respectively.

Interest income, including amortization of premiums and accretion of discounts related to the investments, as well as realized gains and losses from sales of the investments are recorded in other income, net, in the consolidated statements of operations. For the fiscal years ended January 31, 2023, 2022, and 2021, interest income and realized gains and losses, net, were approximately $1.7 million, $1.7 million and $3.6 million, respectively.

The following fair value hierarchy is applied for disclosure of the inputs used to measure fair value. This hierarchy prioritizes the inputs into three broad levels as follows:

Level 1—Inputs are unadjusted quoted prices in active markets for identical assets or liabilities.

Level 2—Inputs are quoted prices for similar assets and liabilities in active markets or inputs that are observable for the assets or liabilities, either directly or indirectly through market corroboration, for substantially the full term of the financial instruments.

Level 3—Unobservable inputs based on the Company’s own assumptions used to measure assets and liabilities at fair value. The inputs require significant management judgment or estimation.

The following tables present the fair value of the financial instruments measured on a recurring basis as of January 31, 2023 and 2022, respectively:


	As of January 31, 2023
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	7,872	$	7,872	$	—	$	—
Commercial paper		18,333		—		18,333		—
Corporate bonds		23,298		—		23,298		—
Asset-backed securities		18,648		—		18,648		—
U.S. government securities		33,043		—		33,043		—
Total cash equivalents and marketable debt securities	$	101,194	$	7,872	$	93,322	$	—

	As of January 31, 2022
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	20	$	20	$	—	$	—
Total cash equivalents and marketable debt securities	$	20	$	20	$	—	$	—

Inventories

12 Months Ended

Jan. 31, 2023

Inventory Disclosure [Abstract]

Inventories

4. Inventories

Inventories at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Work-in-progress	$	26,023	$	25,844
Finished goods		14,463		19,375
Total	$	40,486	$	45,219

Property and Equipment, Net

12 Months Ended

Jan. 31, 2023

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

5. Property and Equipment, net

Depreciation expense was approximately $3.9 million, $2.8 million and $2.6 million for the fiscal years ended January 31, 2023, 2022 and 2021, respectively. Property and equipment at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023			2022
	(in thousands)
Computer hardware and software	$	20,733		$	16,488
Tools and equipment		8,325			7,532
Furniture and fixtures		1,311			1,243
Leasehold improvements		3,295			2,942
Construction in progress		513			1,060
		34,177			29,265
Less: accumulated depreciation and amortization		(22,363	)		(19,131	)
Total property and equipment, net	$	11,814		$	10,134

Intangible Assets, Net

12 Months Ended

Jan. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Intangible Assets, Net

6. Intangible Assets, net

Intangible assets primarily consist of software licenses as well as developed technology, customer relationships and trade name that were acquired from business combinations. In fiscal year 2022, the Company determined that the underlying project incorporating IPR&D from the prior acquisition of VisLab S.r.l., or VisLab, was completed. As a result, the $4.1 million of IPR&D was reclassified as definite-lived developed technology and started amortization over its estimated economic life of 7 years.

The Company enters into certain software license agreements with third parties from time-to-time. The software licenses consist of noncancelable on-premise internal-use software and software with alternative use that is to be sold, leased or otherwise marketed as part of a product. The licenses have been capitalized as intangible assets, and the corresponding future payments have been recorded as liabilities at net present value. As of January 31, 2023, $7.1 million was recorded in accrued and other current liabilities and $9.6 million was recorded in other long-term liabilities in the consolidated balance sheets.

The components of intangible assets as of January 31, 2023 and 2022 were as follows:


	As of January 31, 2023							As of January 31, 2022
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
Software licenses	$	34,128	$	(6,319	)	$	27,809	$	22,093	$	(11,331	)	$	10,762
Developed technology		21,200		(3,932	)		17,268		21,200		(904	)		20,296
Customer relationships		13,200		(1,833	)		11,367		13,200		(367	)		12,833
Trade name		2,500		(447	)		2,053		2,500		(89	)		2,411
Total intangible assets, net	$	71,028	$	(12,531	)	$	58,497	$	58,993	$	(12,691	)	$	46,302

During the twelve months ended January 31, 2023, there were approximately $24.5 million of software licenses purchased and approximately $12.5 million of software licenses retired. The amortization expense associated with software licenses was approximately $7.5 million, $6.4 million and $6.5 million for the fiscal years ended January 31, 2023, 2022 and 2021 respectively. The amortization expense associated with acquisition-related intangible assets, including developed technology, customer relationship and trade name, was approximately $4.9 million and $1.4 million for the fiscal years ended January 31, 2023 and 2022, respectively. There was no amortization expense associated with acquisition-related intangible assets for the fiscal year ended January 31, 2021. The expected future amortization expense related to these intangible assets as of January 31, 2023 is as follows:


	As of
	January 31, 2023
Fiscal Year	(in thousands)
2024	$	13,754
2025		11,996
2026		9,944
2027		5,711
2028		5,711
Thereafter		11,381
Total future amortization expenses:	$	58,497

Intangible assets are tested for impairment at least annually, in the fourth fiscal quarter, or more frequently if events or changes in circumstances indicate that the assets may be impaired. The Company is also required to test the impairment prior to changing the IPR&D from an indefinite-lived asset to a finite-lived asset. There were no intangible asset impairments for the fiscal years ended January 31, 2023, 2022 and 2021, respectively.

Goodwill

12 Months Ended

Jan. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill

7. Goodwill

The Company has one reporting segment and accordingly, there is no goodwill assignment based on reporting units (refer to Note 16). As of January 31, 2023 and 2022, the total carrying amount of goodwill was $303.6 million, respectively. The Company does not amortize goodwill. In the fourth quarter of fiscal year 2023, 2022 and 2021, the Company performed annual goodwill tests and there were no goodwill impairments for the fiscal years ended January 31, 2023, 2022 and 2021, respectively.

Accrued and Other Current Liabilities

12 Months Ended

Jan. 31, 2023

Payables and Accruals [Abstract]

Accrued and Other Current Liabilities

8. Accrued and Other Current Liabilities

Accrued and other current liabilities at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Accrued employee compensation	$	22,152	$	30,044
Accrued product development costs		19,433		10,523
Software license liabilities, current		7,059		6,001
Other accrued liabilities		8,011		5,496
Total accrued and other current liabilities	$	56,655	$	52,064

The timing of SoC development progress and payments to outside foundries resulted in fluctuation in the accrued product development costs. Approximately $10.9 million of annual bonus was paid in fiscal year 2023, of which $3.2 million was paid in cash and $7.7 million was settled with restricted stock units.

Leases

12 Months Ended

Jan. 31, 2023

Leases [Abstract]

Leases

9. Leases

The Company enters into various operating leases for its worldwide facilities.

During the twelve months ended January 31, 2023, the Company extended leases for its Shenzhen office and one of its facilities in Santa Clara, California for an additional two years beginning October 1, 2022 to September 30, 2024. For the lease extensions, the Company recorded an increase to the operating lease ROU assets and corresponding operating lease liabilities of approximately $0.8 million in the consolidated balance sheets.

During the twelve months ended January 31, 2022, the Company extended its existing Shanghai office lease for an additional three years beginning December 1, 2021 to November 30, 2024 and extended its existing Hong Kong office lease for an additional five years beginning December 1, 2021 to November 30, 2026. The Company also leased an additional space for its Shanghai office for a period of 40 months starting from August 1, 2021 through November 30, 2024. The Company recorded an aggregate increase of approximately $4.4 million to the operating lease ROU assets and corresponding operating lease liabilities in the consolidated balance sheets as a result of these lease extensions and additional leased space.

For the fiscal years ended January 31, 2023, 2022 and 2021, the operating lease expense was approximately $3.7 million, $3.5 million and $3.0 million, respectively. The Company's short-term leases and finance leases were immaterial as of January 31, 2023 and 2022, respectively.

Supplemental cash flow information related to the operating leases is as follows:


	Year Ended
	January 31, 2023		January 31, 2022
	(in thousands)
Cash paid for operating leases included in operating cash flows	$	4,011	$	3,608
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$	319	$	365
Leased assets changes arising from lease modifications	$	575	$	2,798

As of January 31, 2023, the weighted average remaining lease term is 2.61 years, and the weighted average discount rate is 3.58%. Future minimum lease payments for the lease liabilities are as follows:


	As of
	January 31, 2023
Fiscal Year	(in thousands)
2024	$	3,766
2025		3,420
2026		1,370
2027		299
2028		125
Thereafter		—
Total future annual minimum lease payments		8,980
Less: interest		(344	)
Total lease liabilities	$	8,636

Other Long-Term Liabilities

12 Months Ended

Jan. 31, 2023

Other Liabilities Disclosure [Abstract]

Other Long-Term Liabilities

10. Other Long-Term Liabilities

Other long-term liabilities at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Unrecognized tax benefits, including interest	$	3,770	$	9,313
Deferred tax liabilities, non-current		1,120		1,769
Software license liabilities, non-current		9,614		1,674
Other long-term liabilities		1,044		7
Total other long-term liabilities	$	15,548	$	12,763

Capital Stock

12 Months Ended

Jan. 31, 2023

Equity [Abstract]

Capital Stock

11. Capital Stock

Preference shares

Since the Company’s initial public offering, or IPO, a total of 20,000,000 preference shares, with a $0.00045 par value per share, were authorized. There were no preference shares issued and outstanding as of January 31, 2023 and 2022, respectively.

Ordinary shares

As of January 31, 2023 and 2022, the following ordinary shares were reserved for future issuance under the Company’s equity plans and employee stock purchase plan:


	As of January 31,
	2023		2022
Shares reserved for options, restricted stock and restricted stock units under equity plans		5,822,819		7,461,541
Shares reserved for employee stock purchase plan		2,986,403		2,624,704

Shares repurchased

There were no shares repurchased in fiscal years 2023 and 2022. On March 16, 2020, the Company repurchased a total of 25,719 of its ordinary shares for approximately $1.0 million in cash under an authorized repurchase program up to $50.0 million. The Company's Board of Directors has approved extensions of the repurchase program through June 30, 2023. As of January 31, 2023, there was approximately $49.0 million available for repurchases through June 30, 2023. Repurchases under the program may be made from time-to-time through open market purchases, 10b5-1 plans or privately negotiated transactions subject to market conditions, applicable legal requirements and other relevant factors. The repurchase program does not obligate the Company to acquire any particular amount of ordinary shares, and it may be suspended at any time at the company's discretion. Repurchases are funded using working capital and any repurchased shares are recorded as authorized but unissued shares.

Employee Benefits and Stock-based Compensation

12 Months Ended

Jan. 31, 2023

Postemployment Benefits [Abstract]

Employee Benefits and Stock-based Compensation

12. Employee Benefits and Stock-based Compensation

401(k) Plan

The Company maintains a defined contribution 401(k) plan (the 401(k) Plan) for all of its eligible U.S. employees. Under the 401(k) Plan, eligible employees may contribute up to the Internal Revenue Service annual contribution limitation. The Company is responsible for administrative costs of the Plan. The Company’s contribution expense for the fiscal years ended January 31, 2023 and 2022 was approximately $0.8 million and $0.6 million, respectively. The Company did not make any matching contributions prior to fiscal year 2022.

Stock OptioPlans

2012 Equity Incentive Plan. The 2012 Equity Incentive Plan, or 2012 EIP, permits the grant of ISOs, within the meaning of Section 422 of the Code, to employees of the Company and any of the Company’s subsidiary corporations, and the grant of NSOs, stock appreciation rights, restricted stock, restricted stock units, performance units, performance shares, deferred stock units and dividend equivalents to employees, directors and consultants of the Company and any of the Company’s subsidiary corporations’ employees and consultants.

2021 Equity Incentive Plan. In June 2021, the Company’s shareholders approved the 2021 Equity Incentive Plan, or 2021 EIP. The 2021 EIP permits the grant of ISOs, within the meaning of Section 422 of the Code, to employees of the Company and any of the Company’s subsidiary or parent corporations, and the grant of NSOs, stock appreciation rights, restricted stock, restricted stock units, and performance awards to employees, directors and consultants of the Company and any of the Company’s subsidiary or parent corporations’ employees and consultants. Upon adoption of the 2021 EIP, the total number of ordinary shares of the Company reserved for issuance under the 2021 Plan was equal to, subject to adjustments upon changes in capitalization as provided under the 2021 EIP, 1,350,000 ordinary shares, plus (i) any ordinary shares subject to outstanding awards granted under the 2012 EIP, that, after the date the 2012 EIP is terminated, are cancelled, expire or otherwise terminate without having been exercised in full or are forfeited to or repurchased by the Company due to failure to vest, and (ii) any ordinary shares that, as of immediately prior to the termination of the 2012 EIP, were available for grant under the 2012 EIP, up to a maximum of 6,834,208 ordinary shares pursuant to clauses (i) and (ii).

In the first quarter of fiscal year 2022, the Company added 1,599,634 shares to the ordinary shares reserved for issuance, pursuant to an “evergreen” provision contained in the 2012 EIP. Upon the approval of the 2021 EIP, the 2012 EIP was terminated. No additional awards will be granted under the 2012 EIP and any shares that were reserved but not issued under the 2012 EIP became available for future grant or sale under the 2021 EIP. However, all outstanding stock options and other awards previously granted under the 2012 EIP will remain subject to the terms of the 2012 EIP.

Oculii Corp. 2017 Stock Option Plan. In November 2021, the Company assumed the Oculii Corp. 2017 Stock Option Plan, or 2017 Plan, as part of the acquisition of Oculii. No additional awards will be granted under the 2017 Plan. However, all outstanding stock options previously granted under the 2017 Plan will remain subject to the terms of the 2017 Plan and any outstanding stock options that are cancelled or forfeited due to failure to vest will immediately expire from the 2017 Plan.

The exercise price of ISOs granted to a holder of more than 10% of the voting power of all classes of the Company’s shares shall be no less than 110% of fair market value on the grant date. The exercise price of ISOs granted to other employees and NSOs shall be no less than 100% of fair market value on the grant date. Options granted under the Plan have a term of up to 10 years from grant date. Options granted to new employees generally vest 25% on the first anniversary service date of the grant and the remainder vest ratably over the following 36 months.

Restricted stock and restricted stock units granted to new employees generally vest as to 1/4th of the shares on the first anniversary service date of the grant and 1/16th of the shares vest every 3 months thereafter, so as to be 100% vested on the fourth anniversary of the vesting commencement date.

Vesting schedules for other service condition, market condition or performance condition awards vary and are subject to approval by the Board of Directors; provided that the performance condition associated awards shall not vest at all until the performance conditions are achieved and are subject to the award’s holders continuing to provide services to the Company through such vesting dates. The performance condition awards are automatically forfeited in their entirety, without any cost to or action by the Company, if there has been no achievement of the performance. The holders of restricted stock have voting power and other rights with respect to such shares, provided, however, that such shares are held in escrow and subject to forfeiture until the shares vested.

Amended and Restated 2012 Employee Stock Purchase Plan. The Amended and Restated 2012 Employee Stock Purchase Plan, or ESPP, permits eligible participants to purchase ordinary shares at a discount through contributions up to 15% of their eligible compensation, subject to any IRS limitations. The ESPP provides each offering and purchasing period of six months in duration. The purchase price is 85% of the lower of the closing price of the Company’s ordinary shares on the first trading day of each offering period or on the purchase date.

In the first quarter of fiscal year 2023 and 2022, the Company added 466,285 and 444,343 shares, respectively, to the ordinary shares reserved for issuance, pursuant to an “evergreen” provision contained in the ESPP. Pursuant to such provision, on February 1st of each fiscal year, the number of ordinary shares reserved for issuance under the ESPP is automatically increased by a number equal to the lesser of (i) 1,500,000 ordinary shares, (ii) one and one quarter percent (1.25%) of the aggregate number of ordinary shares outstanding on such date, or (iii) an amount determined by the Company’s Board of Directors or a duly authorized committee of the Board of Directors.

Stock-based Compensation

The following table presents the classification of stock-based compensation for the periods indicated:


	Year Ended January 31,
	2023		2022		2021
	(in thousands)
Stock-based compensation:
Cost of revenue	$	3,597	$	1,489	$	1,328
Research and development		71,236		54,787		42,903
Selling, general and administrative		36,325		31,525		25,903
Total stock-based compensation	$	111,158	$	87,801	$	70,134

As of January 31, 2023 and 2022, approximately $4.6 million and $7.8 million of stock-based compensation expense, respectively, was accrued in accrued and other current liabilities in the consolidated balance sheets. Total unrecognized compensation cost related to unvested stock options at January 31, 2023 was $15.9 million and is expected to be recognized over a weighted-average period of 1.85 years. Total unrecognized compensation cost related to unvested restricted stock units was $189.7 million and is expected to be recognized over a weighted-average period of 2.41 years. In April 2022, the Company’s Compensation Committee of the Board of Directors approved the acceleration of vesting of 35,703 shares of unvested equity awards associated with the departure of Mr. Casey Eichler, who was the Company’s Chief Financial Officer until March 2022. As a result, there was approximately $1.7 million of additional stock-based compensation expense, net recognized in fiscal year 2023.

The following table sets forth the weighted-average assumptions used to estimate the fair value of stock options and employee stock purchase plan awards for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
Stock Options:
Volatility		—			51	%		52	%
Risk-free interest rate		—			1.04	%		0.52	%
Expected term (years)		—			5.06			5.78
Dividend yield		—			0	%		0	%
Employee stock purchase plan awards:
Volatility		81	%		57	%		59	%
Risk-free interest rate		2.32	%		0.06	%		0.21	%
Expected term (years)		0.5			0.5			0.5
Dividend yield		0	%		0	%		0	%

The following table summarizes stock option activities for the periods indicated:


	Option Outstanding
												Weighted-
										Total Intrinsic		Average
						Weighted-		Weighted-		Value of		Remaining	Aggregate
				Weighted-		Average		Average		options		Contractual	Intrinsic
				Average		Grant-date		Acquisition-date		Exercised		Term	Value
	Shares			Exercise Price		Fair Value		Fair Value		(in thousands)		(in years)	(in thousands)
Outstanding at January 31, 2020		1,124,646		$	32.93
Granted		51,200			59.54	$	28.37
Exercised		(421,736	)		24.52					$	19,401
Forfeited		(11,618	)		46.69
Expired		(23,349	)		70.11
Outstanding at January 31, 2021		719,143			38.33
Granted		14,700			110.19	$	50.28
Assumed		163,581			23.10			$	173.04
Exercised		(269,287	)		28.23					$	25,622
Forfeited		(7,669	)		68.95
Expired		(1,146	)		9.86
Outstanding at January 31, 2022		619,322			40.08
Exercised		(121,624	)		30.34					$	6,712
Forfeited		(10,618	)		55.97
Expired		(2,289	)		39.19
Outstanding at January 31, 2023		484,791			42.18							4.38	$	23,346
Exercisable at January 31, 2023		370,158		$	44.47							3.59	$	16,927

The intrinsic value of options outstanding and exercisable is calculated based on the difference between the fair market value of the Company’s ordinary shares on the reporting date and the exercise price. The closing price of the Company’s stock was $89.84 on January 31, 2023, as reported by The NASDAQ Global Market. The intrinsic value of exercised options is calculated based on the difference between the fair market value of the Company’s stock on the exercise date and the exercise price.

The following table summarizes restricted stock unit activities for the periods indicated:


				Weighted-
				Average
				Grant-Date
	Shares			Fair Value
Unvested at January 31, 2020		2,617,266		$	50.30
Granted		1,499,203			53.45
Vested		(1,162,883	)		50.53
Forfeited		(81,785	)		54.48
Unvested at January 31, 2021		2,871,801			51.73
Granted		1,213,257			128.80
Vested		(1,367,309	)		53.85
Forfeited		(66,614	)		71.59
Unvested at January 31, 2022		2,651,135			85.41
Granted		1,549,174			74.45
Vested		(1,513,972	)		71.32
Forfeited		(112,978	)		99.46
Unvested at January 31, 2023		2,573,359		$	86.81

Total fair value as of the respective vesting dates of restricted stock units vested for the fiscal years ended January 31, 2023, 2022 and 2021 was approximately $122.0 million, $192.5 million, and $69.0 million, respectively. As of January 31, 2023, the aggregate intrinsic value of unvested restricted stock units was $231.2 million.

Net Loss Per Ordinary Share

12 Months Ended

Jan. 31, 2023

Earnings Per Share [Abstract]

Net Loss Per Ordinary Share

13. Net Loss Per Ordinary Share

The following table sets forth the computation of basic and diluted net loss per ordinary share for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands, except share and per share data)
Numerator:
Net loss	$	(65,386	)	$	(26,411	)	$	(59,786	)
Denominator:
Weighted-average ordinary shares - basic		38,363,638			36,577,120			34,679,717
Weighted-average ordinary shares - diluted		38,363,638			36,577,120			34,679,717
Net loss per ordinary share:
Basic	$	(1.70	)	$	(0.72	)	$	(1.72	)
Diluted	$	(1.70	)	$	(0.72	)	$	(1.72	)

The following weighted-average potentially dilutive securities were excluded from the computation of diluted net loss per ordinary share as their effect would have been antidilutive:


	Year Ended January 31,
	2023		2022		2021
Options to purchase ordinary shares		336,828		327,747		660,025
Restricted stock units		1,550,679		1,388,091		1,440,176
Employee stock purchase plan		10,883		8,904		27,789
		1,898,390		1,724,742		2,127,990

Income Taxes

12 Months Ended

Jan. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

14. Income Taxes

Loss before income taxes consisted of the following for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
U.S. operations	$	(18,968	)	$	(5,842	)	$	8
Non-U.S. operations		(51,970	)		(22,799	)		(57,311	)
Loss before income taxes	$	(70,938	)	$	(28,641	)	$	(57,303	)

Income tax provision (benefit) consisted of the following for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Current:
U.S. federal tax	$	(3,525	)	$	907		$	1,705
U.S. state taxes		175			—			256
Non-U.S. foreign taxes		2,395			1,778			1,019
		(955	)		2,685			2,980
Deferred:
U.S. federal tax		(4,231	)		(4,819	)		(432	)
U.S. state taxes		—			(14	)		—
Non-U.S. foreign taxes		(366	)		(82	)		(65	)
		(4,597	)		(4,915	)		(497	)
Provision (benefit) for income taxes	$	(5,552	)	$	(2,230	)	$	2,483

The Company consists of a Cayman Islands parent company with various foreign and U.S. subsidiaries. Effective December 31, 2019, the Company has structured its activities to comply with the International Tax Co-Operation (Economic Substance) Law, 2018 in the Cayman Islands. As part of the new structure, the Company is the general partner of a Canadian limited partnership, the ultimate beneficial owner, and is allocated all of the earnings of the partnership. The primary jurisdiction where our foreign earnings are derived is the Cayman Islands, where the Company is domiciled. Under the current laws of the Cayman Islands, the Company is not subject to tax on its income. For purposes of the reconciliation between the provision (benefit) for income taxes at the statutory rate and the effective tax rate, a notional U.S. 21% rate is applied to pretax income (loss) as a result of the following for the periods indicated, respectively:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Provision at U.S. notional statutory rate	$	(14,897	)	$	(6,015	)	$	(12,034	)
U.S. state taxes		114			(11	)		212
Non-U.S. foreign tax differential		12,943			6,483			12,989
Stock-based compensation		10,004			1,900			4,943
U.S. R&D credit		(5,045	)		(5,886	)		(3,928	)
Valuation allowance		2,124			765			—
FIN48 interest		(739	)		311			—
Uncertain tax position release		(10,188	)		—			—
Other		132			223			301
Provision (benefit) for income taxes	$	(5,552	)	$	(2,230	)	$	2,483

Temporary differences that gave rise to significant portions of the Company’s deferred tax assets and liabilities at January 31, 2023 and 2022 were as follows:


	As of January 31,
	2023			2022
	(in thousands)
Deferred tax assets:
Federal and state credits	$	40,134		$	33,485
Net operating losses		6,659			7,466
Expenses not currently deductible		3,164			1,294
Operating lease liabilities		1,582			2,096
Stock-based compensation		3,678			3,632
Foreign deferred		262			191
Gross deferred tax assets		55,479			48,164
Valuation allowance		(28,596	)		(24,083	)
Total deferred tax assets	$	26,883		$	24,081
Deferred tax liabilities
Intangible assets		(6,782	)		(8,150	)
Property and equipment		(617	)		(386	)
Operating lease assets		(1,452	)		(1,971	)
Net deferred tax assets	$	18,032		$	13,574

Tax valuation allowance for the periods indicated below were as follows:


							Deductions
					Additions		Charged to
	Balance at		Additional		Charged to		Expenses		Balance at
	Beginning of		Charged to		Other		or Other		End of
	Period		Expenses		Account		Accounts		Period
	(in thousands)
Tax Valuation Allowance
Year ended January 31, 2023	$	24,083		4,513		—		—	$	28,596
Year ended January 31, 2022	$	17,962		4,874		1,247		—	$	24,083
Year ended January 31, 2021	$	14,670		3,292		—		—	$	17,962

The Company conducts its business in several countries and regions and is subject to taxation in those jurisdictions. The Company is incorporated in the Cayman Islands with foreign subsidiaries in the U.S., China, Taiwan, Italy and other foreign countries and regions. As such, the Company’s worldwide operating income is subject to varying tax rates and its effective tax rate is highly dependent upon the geographic distribution of its earnings or losses and the tax laws and regulations in each geographical region. Consequently, the Company has experienced lower effective tax rates as a substantial amount of its operations are conducted in lower-tax jurisdictions. If the Company’s operational structure was to change in such a manner that would increase the amount of operating income subject to taxation in higher-tax jurisdictions, or if the Company was to commence operations in jurisdictions assessing relatively higher tax rates, its effective tax rate could fluctuate significantly on a quarterly basis and/or be adversely affected. Dividend distributions received from the Company’s U.S. subsidiary and certain other foreign subsidiaries may be subject to local country withholding taxes when, and if, distributed. Deferred tax liabilities have not been recorded on unremitted earnings of certain subsidiaries because management’s intent is to indefinitely reinvest any undistributed earnings in those subsidiaries. If dividend distributions from those subsidiaries were to occur, the liability as of January 31, 2023 would be $15.6 million. Cumulative undistributed earnings of foreign subsidiaries for which no deferred taxes have been provided approximated $107.9 million at January 31, 2023.

As of January 31, 2023 and 2022, the Company had deferred tax assets (net of deferred tax liabilities) before valuation allowance, of $46.6 million and $37.7 million, respectively. The Company assesses whether a valuation allowance should be established against its deferred tax assets based on the consideration of all available evidence, using a “more likely than not” standard.

The Company has Federal and California net operating losses of $31.4 million and $1.0 million, respectively, as of January 31, 2023. The Federal net operating loss carryforwards begin to expire in fiscal year 2037. The California net operating loss carryforwards begin to expire in fiscal year 2040, if not utilized. For financial statement purposes these carry forwards are offset by uncertain tax positions.

The Company also has Federal and California state research and development credit carryforwards of approximately $27.5 million and $37.5 million, respectively, at January 31, 2023. The Federal credits begin to expire in fiscal year 2037. The California credits can be carried forward indefinitely.

The Company reports its U.S. state deferred tax assets and related valuation allowance, net of the U.S federal tax rate of 21%. As of January 31, 2023, the Company has recorded a valuation allowance of $24.5 million against all of its U.S. state deferred tax assets due to uncertainty regarding the future utilization of these deferred tax assets. In addition, the Company has recorded a valuation allowance of $4.1 million against the federal deferred tax assets of Oculii Corp.

Utilization of the net operating loss and research credit carryforwards may be subject to an annual limitation due to the ownership percentage change limitations as defined by the U.S. Internal Revenue Code Section 382, as amended, and similar state provisions. The annual limitation may result in the expiration of the U.S. Federal and state research credit carryforwards before utilization. The Company does not expect any net operating loss or tax credit carryforwards to expire as a result of a Section 382 limitation.

The Company applies the provisions of FASB’s guidance on accounting for uncertainty in income taxes. As of January 31, 2023, the Company had approximately $21.7 million in unrecognized tax benefits, $14.8 million of which would affect the Company’s effective tax rate if recognized. The remainder of the unrecognized tax benefits would not affect the effective tax rate due to the full valuation recorded for state deferred tax assets. Certain fiscal year 2021 amounts have been revised to reflect unrecognized tax benefits on a gross basis. The following table sets forth a reconciliation of the beginning and ending amount of unrecognized tax benefits:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Beginning balance:	$	30,884		$	29,527		$	42,695
Additions based on tax positions related to the current year		1,033			1,412			3,360
Additions for tax positions of prior years		195			55			16
Reductions for tax positions in prior years		(45	)		—			(10,212	)
Settlements for prior periods		—			—			(6,087	)
Lapse of applicable statute of limitations		(10,411	)		(110	)		(245	)
Ending balance:	$	21,656		$	30,884		$	29,527

The Company classified $3.2 million and $8.0 million of income tax liabilities as other long-term liabilities as of January 31, 2023 and 2022, respectively, because payment of cash or settlement is not anticipated within one year from the balance sheet date.

The Company recognizes interest and penalties related to uncertain tax positions as a component of income tax expense. The Company recorded a benefit of $0.7 million, expense of $0.3 million and expense of $0.3 million for interest and penalties related to uncertain tax positions for the fiscal years ended January 31, 2023, 2022 and 2021, respectively. The benefit in fiscal year 2023 was due to the release of a prior year reserve upon lapse of statute of limitations. The Company recorded noncurrent liabilities of $0.6 million and $1.3 million related to interest and penalties for uncertain tax positions at January 31, 2023 and 2022, respectively.

The primary jurisdiction where our foreign earnings are derived is the Cayman Islands, where the Company is domiciled. The Company files income tax returns in the U.S. federal jurisdiction as well as many U.S. state and foreign jurisdictions. The Internal Revenue Service has closed the examination of the Company’s U.S. federal income tax return for the fiscal year ended January 31, 2017. At January 31, 2023, the Company’s fiscal year 2020 through 2023 tax years are generally open and subject to potential examination by U.S. federal tax authorities. The Company’s fiscal year 2019 through 2023 tax years are generally open and subject to potential examination by state tax authorities. The Company’s fiscal years 2016 to 2023 remain open to examination by foreign tax authorities. Fiscal years outside of the normal statute of limitations remain open to audit by tax authorities due to tax attributes generated in those earlier years, which have been carried forward and may be audited in subsequent years when utilized.

The Company regularly assesses the likelihood of adverse outcomes resulting from potential tax examinations to determine the adequacy of its provision for income taxes. These assessments can require considerable estimates and judgments. During the fiscal year ended January 31, 2023, the gross amount of unrecognized tax benefits decreased by $9.2 million to $21.7 million. The decrease was primarily due to the release of prior year reserves upon the lapse of the statute of limitations. If the estimates of income tax liabilities prove to be less than the ultimate assessment, then a further charge to expense could be required. If events occur, and the payment of these amounts ultimately proves to be unnecessary, the reversal of the liabilities could result in tax benefits being recognized in the period in which the Company determines the liabilities are no longer necessary. The Company does not anticipate significant changes to its uncertain tax positions during the next twelve months.

As of January 31, 2023, the Company’s long-term income taxes payable, including estimated interest and penalties, was approximately $3.8 million. The Company was unable to make a reasonably reliable estimate of the timing of payments in individual years due to uncertainties in the timing of tax audits, if any, or their outcomes.

On July 27, 2015, the United States Tax Court issued a decision (“Tax Court Decision”) in Altera Corp. v. Commissioner, which concluded that related parties in a cost sharing arrangement are not required to share expenses related to share-based compensation. The Tax Court Decision was appealed by the Commissioner to the Ninth Circuit Court of Appeals (“Ninth Circuit”). On June 7, 2019, the Ninth Circuit issued an opinion that reversed the Tax Court Decision. On July 22, 2019, the taxpayer requested a rehearing before the full Ninth Circuit and the request was denied on November 12, 2019. On February 10, 2020, the taxpayer filed a petition to appeal the decision with the Supreme Court of the United States which was denied on June 22, 2020. The denial of the request by the Supreme Court did not have a material impact to the Company’s provision for income taxes.

- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
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-Section 50
-Paragraph 21
-URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32857-109319

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

+ Details

Commitments and Contingencies

12 Months Ended

Jan. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

15. Commitments and Contingencies

Contract Manufacturer Commitments

The Company’s components and products are procured and built by independent contract manufacturers based on sales forecasts. These forecasts include estimates of future demand, historical trends, analysis of sales and marketing activities, and adjustment of overall market conditions. The Company regularly issues purchase orders to independent contract manufacturers which are cancelable upon agreement between the Company and the third-party manufacturers. These manufacturing purchase commitments typically provide the Company with flexibility to cancel, reschedule or adjust requirements based upon business needs but the Company may incur certain costs depending on the production stage of the products. As of January 31, 2023 and 2022, total manufacturing purchase commitments were approximately $43.6 million and $71.5 million, respectively. The Company also reviews and assesses the need for any expected loss liabilities on quarterly basis for all products that it does not expect to sell for which it has committed purchases from suppliers. As of January 31, 2023, an approximately $2.9 million loss was recognized in the consolidated balance sheets from adverse purchase commitments. There were no material loss liabilities recorded in the consolidated balance sheets from adverse purchase commitments as of January 31, 2022.

Indemnification

The Company, from time to time, in the normal course of business, indemnifies certain vendors with whom it enters into contractual relationships. The Company has agreed to hold the other party harmless against third-party claims in connection with the Company’s future products. The Company also indemnifies certain customers against third-party claims related to certain intellectual property and product liability matters. It is not possible to determine the maximum potential amount of liability under these indemnification obligations due to the limited history of prior indemnification claims and the unique facts and circumstances that are likely to be involved in each particular claim. The Company has not made payments under these obligations as of January 31, 2023, and no liabilities have been recorded for these obligations in the consolidated balance sheets as of January 31, 2023 and 2022, respectively.

Other Matters

From time to time, the Company is subject to commercial disputes, employment issues, intellectual property claims and litigation, in the ordinary course of its business. Although the ultimate disposition of asserted claims cannot be predicted with certainty, it is the Company’s belief that the outcome of any such claims, either individually or on a combined basis, will not have a material adverse effect on its consolidated financial position. The results of any litigation cannot be predicted with certainty, and regardless of the outcome, litigation can have an adverse impact on the Company because of defense and settlement costs, diversion of management resources, and other factors. As of January 31, 2023 and 2022, there were not any accruals for contingent liabilities related to such matters recorded in the consolidated balance sheets.

Segment Reporting

12 Months Ended

Jan. 31, 2023

Segment Reporting [Abstract]

Segment Reporting

16. Segment Reporting

The Company operates in one operating and reporting segment related to the development and sales of low-power, HD, Ultra HD video compression, image processing and computer vision solutions. The Chief Executive Officer of the Company has been identified as the Chief Operating Decision Maker (the CODM) and manages the Company’s operations as a whole. For the purpose of evaluating financial performance and allocating resources, the CODM reviews financial information presented on a consolidated basis accompanied by information by customer and geographic region.

Geographic Revenue

The following table sets forth the Company’s revenue by geographic region based on bill-to location for the periods indicated.


	Year Ended January 31,
	2023		2022		2021
	(in thousands)
Taiwan	$	203,828	$	209,044	$	139,327
Asia Pacific		73,371		81,480		57,270
Europe		25,065		17,823		9,415
North America other than United States		23,164		18,191		10,304
United States		12,178		5,318		6,674
Total revenue	$	337,606	$	331,856	$	222,990

Substantially all of the Company’s property and equipment were located in the Asia Pacific region, United States and Europe. As of January 31, 2023, the net amount of these fixed assets located in these regions was approximately $6.3 million, $4.0 million and $1.5 million, respectively. As of January 31, 2022, the net amount of these fixed assets located in these regions was approximate $5.6 million, $3.1 million and $1.5 million, respectively.

Major Customers

The customers representing 10% or more of revenue and accounts receivable for the fiscal years ended January 31, 2023, 2022 ad 2021 were Wintech and Chicony. For the fiscal years ended January 31, 2023, 2022 and 2021, Wintech accounted for approximately 57%, 62% and 63% of total revenue, respectively. For the fiscal years ended January 31, 2023, 2022 and 2021, Chicony accounted for approximately 12%, 13% and 16% of total revenue, respectively. Accounts receivable with Wintech and Chicony were approximately $21.0 million and $9.4 million as of January 31, 2023, respectively. Accounts receivable with Wintech and Chicony were approximately $23.3 million and $7.4 million as of January 31, 2022, respectively.

- Definition

The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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Reference 13: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-URI https://asc.fasb.org/topic&trid=2134510

+ Details

Subsequent Event

12 Months Ended

Jan. 31, 2023

Subsequent Events [Abstract]

Subsequent Event

17. Subsequent Event

On March 10, 2023, Silicon Valley Bank (SVB) was closed by the California Department of Financial Protection and Innovation, which appointed the Federal Deposit Insurance Corporation (FDIC) as receiver. At the time of closing, the Company had cash deposits with SVB of approximately $17.0 million. On March 13, 2023, the Company withdrew all of its cash on deposit with SVB. The Company also has cash equivalents and marketable debt security investments residing in custodial accounts held by U.S. Bank for which SVB Asset Management was the investment advisor until March 15, 2023. The Company’s investment portfolio currently does not contain any securities of SVB. The Company holds sufficient liquid assets with other banks to manage its operational needs. Accordingly, the Company does not believe the closure of SVB and appointment of FDIC as receiver have an impact on its business or financial position, but will continue to monitor the situation as it evolves.

Organization and Summary of Significant Accounting Policies (Policies)

12 Months Ended

Jan. 31, 2023

Accounting Policies [Abstract]

Organization

Basis of Consolidation

Use of Estimates

Concentration of Risk

Foreign Currency Transactions

Fair Value of Financial Instruments

Cash Equivalents and Marketable Debt Securities

Restricted Cash


	As of January 31,
	2023		2022		2021
	(in thousands)
Cash and cash equivalents	$	113,541	$	171,043	$	241,274
Restricted cash		8		10		10
Total as presented in the consolidated statements of cash flows	$	113,549	$	171,053	$	241,284

Trade Accounts Receivable and Allowance for Credit Losses

Inventories

Property and Equipment

Impairment of Long-Lived Assets Excluding Goodwill

Equity Investment

Revenue Recognition

Cost of Revenue

Research and Development

Selling, General and Administrative

Stock-Based Compensation

Income Taxes

Net Income (Loss) Per Ordinary Share

Comprehensive Loss

Comprehensive loss includes unrealized gains or losses from available-for-sale securities that are excluded from net loss.

Recent Accounting Pronouncements

Organization and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2023

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

The following table presents cash, cash equivalents and restricted cash reported on the consolidated balance sheets, and the sums are presented on the consolidated statements of cash flows:


	As of January 31,
	2023		2022		2021
	(in thousands)
Cash and cash equivalents	$	113,541	$	171,043	$	241,274
Restricted cash		8		10		10
Total as presented in the consolidated statements of cash flows	$	113,549	$	171,053	$	241,284

Business Combination (Tables)

12 Months Ended

Jan. 31, 2023

Business Combinations [Abstract]

Summary of Aggregate Purchase Consideration

The aggregate purchase consideration has been allocated as follows:


	Amount
	(in thousands)
Cash consideration transferred	$	355,071
Net working capital adjustment		247
Fair value of stock-based compensation awards attributable to pre-combination services		407
Total purchase consideration	$	355,725

Summary of Fair Values of Assets Acquired and Liabilities Assumed

The following table sets forth the fair values of the assets acquired and liabilities assumed in connection with the acquisition:


	Acquisition Date
	Fair Value
	(in thousands)
Cash and cash equivalents	$	48,032
Accounts receivable		733
Inventories		194
Prepaid expenses and other current assets		134
Property and equipment		155
Intangible assets		32,800
Goodwill		277,024
Other non-current assets		34
Total assets acquired		359,106
Accounts payable		223
Accrued and other current liabilities		2,193
Deferred income tax liability, non-current		965
Total liabilities assumed		3,381
Total purchase consideration	$	355,725

Summary of Intangible Assets Acquired in Acquisition

Below is a summary of intangible assets acquired in the acquisition:


	Acquisition Date		Estimated
	Fair Value		Useful Lives
	(in thousands)
Trade name (1)	$	2,500	7 years
Customer relationships (2)		13,200	9 years
Developed technology (1)		17,100	7 years
Total intangible assets acquired	$	32,800

_____________

(1)

The fair values of trade name and developed technology were determined by applying the Relief-from-Royalty Method under the income approach.

(2)

Customer relationships represent the fair value of the existing relationships using the Multi-Period Excess Earnings Method.

Summary of Unaudited Information


	Pro Forma Year Ended
	January 31, 2022			January 31, 2021
	(unaudited, in thousands)
Revenue	$	333,323		$	223,497
Net loss	$	(35,330	)	$	(78,644	)

Financial Instruments and Fair Value (Tables)

12 Months Ended

Jan. 31, 2023

Investments, All Other Investments [Abstract]

Schedule of Available-for-Sale Securities at Fair Value

All of the investments are denominated in United States dollars and reported at fair value as available-for-sale securities in the consolidated balance sheets as follows:


	As of January 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	7,872	$	—	$	—		$	7,872
Commercial paper		18,333		—		—			18,333
Corporate bonds		23,472		50		(224	)		23,298
Asset-backed securities		18,753		44		(149	)		18,648
U.S. government securities		33,256		22		(235	)		33,043
Total cash equivalents and marketable debt securities	$	101,686	$	116	$	(608	)	$	101,194

	As of January 31, 2022
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	20	$	—	$	—		$	20
Total cash equivalents and marketable debt securities	$	20	$	—	$	—		$	20

Schedule of Cash Equivalents and Marketable Debt Securities


	As of
	January 31, 2023		January 31, 2022
	(in thousands)
Included in cash equivalents	$	7,872	$	20
Included in marketable debt securities		93,322		—
Total cash equivalents and marketable debt securities	$	101,194	$	20

Summary of Contractual Maturities of Investments

The contractual maturities of the investments at January 31, 2023 and 2022 were as follows:


	As of
	January 31, 2023		January 31, 2022
	(in thousands)
Due within one year	$	48,016	$	20
Due in 1-5 years		52,414		—
Due in 5-7 years		764		—
Total cash equivalents and marketable debt securities	$	101,194	$	20

Schedule of Fair Value of Financial Instruments Measured on Recurring Basis

The following tables present the fair value of the financial instruments measured on a recurring basis as of January 31, 2023 and 2022, respectively:


	As of January 31, 2023
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	7,872	$	7,872	$	—	$	—
Commercial paper		18,333		—		18,333		—
Corporate bonds		23,298		—		23,298		—
Asset-backed securities		18,648		—		18,648		—
U.S. government securities		33,043		—		33,043		—
Total cash equivalents and marketable debt securities	$	101,194	$	7,872	$	93,322	$	—

	As of January 31, 2022
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	20	$	20	$	—	$	—
Total cash equivalents and marketable debt securities	$	20	$	20	$	—	$	—

Inventories (Tables)

12 Months Ended

Jan. 31, 2023

Inventory Disclosure [Abstract]

Schedule of Inventory

Inventories at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Work-in-progress	$	26,023	$	25,844
Finished goods		14,463		19,375
Total	$	40,486	$	45,219

Property and Equipment, Net (Tables)

12 Months Ended

Jan. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

Property and equipment at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023			2022
	(in thousands)
Computer hardware and software	$	20,733		$	16,488
Tools and equipment		8,325			7,532
Furniture and fixtures		1,311			1,243
Leasehold improvements		3,295			2,942
Construction in progress		513			1,060
		34,177			29,265
Less: accumulated depreciation and amortization		(22,363	)		(19,131	)
Total property and equipment, net	$	11,814		$	10,134

Intangible Assets, Net (Tables)

12 Months Ended

Jan. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Components of Intangible Assets

The components of intangible assets as of January 31, 2023 and 2022 were as follows:


	As of January 31, 2023							As of January 31, 2022
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
Software licenses	$	34,128	$	(6,319	)	$	27,809	$	22,093	$	(11,331	)	$	10,762
Developed technology		21,200		(3,932	)		17,268		21,200		(904	)		20,296
Customer relationships		13,200		(1,833	)		11,367		13,200		(367	)		12,833
Trade name		2,500		(447	)		2,053		2,500		(89	)		2,411
Total intangible assets, net	$	71,028	$	(12,531	)	$	58,497	$	58,993	$	(12,691	)	$	46,302

Summary of Expected Future Amortization Expense Related to Intangible Assets

The expected future amortization expense related to these intangible assets as of January 31, 2023 is as follows:


	As of
	January 31, 2023
Fiscal Year	(in thousands)
2024	$	13,754
2025		11,996
2026		9,944
2027		5,711
2028		5,711
Thereafter		11,381
Total future amortization expenses:	$	58,497

Accrued and Other Current Liabilities (Tables)

12 Months Ended

Jan. 31, 2023

Payables and Accruals [Abstract]

Schedule of Accrued and Other Current Liabilities

Accrued and other current liabilities at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Accrued employee compensation	$	22,152	$	30,044
Accrued product development costs		19,433		10,523
Software license liabilities, current		7,059		6,001
Other accrued liabilities		8,011		5,496
Total accrued and other current liabilities	$	56,655	$	52,064

Leases (Tables)

12 Months Ended

Jan. 31, 2023

Leases [Abstract]

Schedule of Supplemental Cash Flow Information Related to Operating Leases

Supplemental cash flow information related to the operating leases is as follows:


	Year Ended
	January 31, 2023		January 31, 2022
	(in thousands)
Cash paid for operating leases included in operating cash flows	$	4,011	$	3,608
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$	319	$	365
Leased assets changes arising from lease modifications	$	575	$	2,798

Schedule of Future Minimum Lease Payments for Lease Liabilities


	As of
	January 31, 2023
Fiscal Year	(in thousands)
2024	$	3,766
2025		3,420
2026		1,370
2027		299
2028		125
Thereafter		—
Total future annual minimum lease payments		8,980
Less: interest		(344	)
Total lease liabilities	$	8,636

Other Long-Term Liabilities (Tables)

12 Months Ended

Jan. 31, 2023

Other Liabilities Disclosure [Abstract]

Schedule of Other Long-Term Liabilities

Other long-term liabilities at January 31, 2023 and 2022 consisted of the following:


	As of January 31,
	2023		2022
	(in thousands)
Unrecognized tax benefits, including interest	$	3,770	$	9,313
Deferred tax liabilities, non-current		1,120		1,769
Software license liabilities, non-current		9,614		1,674
Other long-term liabilities		1,044		7
Total other long-term liabilities	$	15,548	$	12,763

Capital Stock (Tables)

12 Months Ended

Jan. 31, 2023

Equity [Abstract]

Schedule of Ordinary Shares Reserved for Future Issuance under Company's Equity Plans and Employee Stock Purchase Plan

As of January 31, 2023 and 2022, the following ordinary shares were reserved for future issuance under the Company’s equity plans and employee stock purchase plan:


	As of January 31,
	2023		2022
Shares reserved for options, restricted stock and restricted stock units under equity plans		5,822,819		7,461,541
Shares reserved for employee stock purchase plan		2,986,403		2,624,704

Employee Benefits and Stock-based Compensation (Tables)

12 Months Ended

Jan. 31, 2023

Postemployment Benefits [Abstract]

Classification of Stock-based Compensation

The following table presents the classification of stock-based compensation for the periods indicated:


	Year Ended January 31,
	2023		2022		2021
	(in thousands)
Stock-based compensation:
Cost of revenue	$	3,597	$	1,489	$	1,328
Research and development		71,236		54,787		42,903
Selling, general and administrative		36,325		31,525		25,903
Total stock-based compensation	$	111,158	$	87,801	$	70,134

Weighted-Average Assumptions Used to Estimate Fair Value

The following table sets forth the weighted-average assumptions used to estimate the fair value of stock options and employee stock purchase plan awards for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
Stock Options:
Volatility		—			51	%		52	%
Risk-free interest rate		—			1.04	%		0.52	%
Expected term (years)		—			5.06			5.78
Dividend yield		—			0	%		0	%
Employee stock purchase plan awards:
Volatility		81	%		57	%		59	%
Risk-free interest rate		2.32	%		0.06	%		0.21	%
Expected term (years)		0.5			0.5			0.5
Dividend yield		0	%		0	%		0	%

Stock Option Activities

The following table summarizes stock option activities for the periods indicated:


	Option Outstanding
												Weighted-
										Total Intrinsic		Average
						Weighted-		Weighted-		Value of		Remaining	Aggregate
				Weighted-		Average		Average		options		Contractual	Intrinsic
				Average		Grant-date		Acquisition-date		Exercised		Term	Value
	Shares			Exercise Price		Fair Value		Fair Value		(in thousands)		(in years)	(in thousands)
Outstanding at January 31, 2020		1,124,646		$	32.93
Granted		51,200			59.54	$	28.37
Exercised		(421,736	)		24.52					$	19,401
Forfeited		(11,618	)		46.69
Expired		(23,349	)		70.11
Outstanding at January 31, 2021		719,143			38.33
Granted		14,700			110.19	$	50.28
Assumed		163,581			23.10			$	173.04
Exercised		(269,287	)		28.23					$	25,622
Forfeited		(7,669	)		68.95
Expired		(1,146	)		9.86
Outstanding at January 31, 2022		619,322			40.08
Exercised		(121,624	)		30.34					$	6,712
Forfeited		(10,618	)		55.97
Expired		(2,289	)		39.19
Outstanding at January 31, 2023		484,791			42.18							4.38	$	23,346
Exercisable at January 31, 2023		370,158		$	44.47							3.59	$	16,927

Restricted Stock Unit Activities

The following table summarizes restricted stock unit activities for the periods indicated:


				Weighted-
				Average
				Grant-Date
	Shares			Fair Value
Unvested at January 31, 2020		2,617,266		$	50.30
Granted		1,499,203			53.45
Vested		(1,162,883	)		50.53
Forfeited		(81,785	)		54.48
Unvested at January 31, 2021		2,871,801			51.73
Granted		1,213,257			128.80
Vested		(1,367,309	)		53.85
Forfeited		(66,614	)		71.59
Unvested at January 31, 2022		2,651,135			85.41
Granted		1,549,174			74.45
Vested		(1,513,972	)		71.32
Forfeited		(112,978	)		99.46
Unvested at January 31, 2023		2,573,359		$	86.81

Net Loss Per Ordinary Share (Tables)

12 Months Ended

Jan. 31, 2023

Earnings Per Share [Abstract]

Computation of Basic and Diluted Net Loss Per Ordinary Share

The following table sets forth the computation of basic and diluted net loss per ordinary share for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands, except share and per share data)
Numerator:
Net loss	$	(65,386	)	$	(26,411	)	$	(59,786	)
Denominator:
Weighted-average ordinary shares - basic		38,363,638			36,577,120			34,679,717
Weighted-average ordinary shares - diluted		38,363,638			36,577,120			34,679,717
Net loss per ordinary share:
Basic	$	(1.70	)	$	(0.72	)	$	(1.72	)
Diluted	$	(1.70	)	$	(0.72	)	$	(1.72	)

Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Ordinary Share

The following weighted-average potentially dilutive securities were excluded from the computation of diluted net loss per ordinary share as their effect would have been antidilutive:


	Year Ended January 31,
	2023		2022		2021
Options to purchase ordinary shares		336,828		327,747		660,025
Restricted stock units		1,550,679		1,388,091		1,440,176
Employee stock purchase plan		10,883		8,904		27,789
		1,898,390		1,724,742		2,127,990

Income Taxes (Tables)

12 Months Ended

Jan. 31, 2023

Income Tax Disclosure [Abstract]

Summary of Loss before Income Taxes

Loss before income taxes consisted of the following for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
U.S. operations	$	(18,968	)	$	(5,842	)	$	8
Non-U.S. operations		(51,970	)		(22,799	)		(57,311	)
Loss before income taxes	$	(70,938	)	$	(28,641	)	$	(57,303	)

Schedule of Income Tax Provision (Benefit)

Income tax provision (benefit) consisted of the following for the periods indicated:


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Current:
U.S. federal tax	$	(3,525	)	$	907		$	1,705
U.S. state taxes		175			—			256
Non-U.S. foreign taxes		2,395			1,778			1,019
		(955	)		2,685			2,980
Deferred:
U.S. federal tax		(4,231	)		(4,819	)		(432	)
U.S. state taxes		—			(14	)		—
Non-U.S. foreign taxes		(366	)		(82	)		(65	)
		(4,597	)		(4,915	)		(497	)
Provision (benefit) for income taxes	$	(5,552	)	$	(2,230	)	$	2,483

Schedule of Reconciliation Between the Provision (Benefit) for Income Taxes at the Statutory Rate and the Effective Tax Rate


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Provision at U.S. notional statutory rate	$	(14,897	)	$	(6,015	)	$	(12,034	)
U.S. state taxes		114			(11	)		212
Non-U.S. foreign tax differential		12,943			6,483			12,989
Stock-based compensation		10,004			1,900			4,943
U.S. R&D credit		(5,045	)		(5,886	)		(3,928	)
Valuation allowance		2,124			765			—
FIN48 interest		(739	)		311			—
Uncertain tax position release		(10,188	)		—			—
Other		132			223			301
Provision (benefit) for income taxes	$	(5,552	)	$	(2,230	)	$	2,483

Schedule of Deferred Tax Assets and Liabilities


	As of January 31,
	2023			2022
	(in thousands)
Deferred tax assets:
Federal and state credits	$	40,134		$	33,485
Net operating losses		6,659			7,466
Expenses not currently deductible		3,164			1,294
Operating lease liabilities		1,582			2,096
Stock-based compensation		3,678			3,632
Foreign deferred		262			191
Gross deferred tax assets		55,479			48,164
Valuation allowance		(28,596	)		(24,083	)
Total deferred tax assets	$	26,883		$	24,081
Deferred tax liabilities
Intangible assets		(6,782	)		(8,150	)
Property and equipment		(617	)		(386	)
Operating lease assets		(1,452	)		(1,971	)
Net deferred tax assets	$	18,032		$	13,574

Summary of Tax Valuation Allowance


							Deductions
					Additions		Charged to
	Balance at		Additional		Charged to		Expenses		Balance at
	Beginning of		Charged to		Other		or Other		End of
	Period		Expenses		Account		Accounts		Period
	(in thousands)
Tax Valuation Allowance
Year ended January 31, 2023	$	24,083		4,513		—		—	$	28,596
Year ended January 31, 2022	$	17,962		4,874		1,247		—	$	24,083
Year ended January 31, 2021	$	14,670		3,292		—		—	$	17,962

Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits


	Year Ended January 31,
	2023			2022			2021
	(in thousands)
Beginning balance:	$	30,884		$	29,527		$	42,695
Additions based on tax positions related to the current year		1,033			1,412			3,360
Additions for tax positions of prior years		195			55			16
Reductions for tax positions in prior years		(45	)		—			(10,212	)
Settlements for prior periods		—			—			(6,087	)
Lapse of applicable statute of limitations		(10,411	)		(110	)		(245	)
Ending balance:	$	21,656		$	30,884		$	29,527

Segment Reporting (Tables)

12 Months Ended

Jan. 31, 2023

Segment Reporting [Abstract]

Company's Revenue by Geographic Region Based on Bill-to Location

The following table sets forth the Company’s revenue by geographic region based on bill-to location for the periods indicated.


	Year Ended January 31,
	2023		2022		2021
	(in thousands)
Taiwan	$	203,828	$	209,044	$	139,327
Asia Pacific		73,371		81,480		57,270
Europe		25,065		17,823		9,415
North America other than United States		23,164		18,191		10,304
United States		12,178		5,318		6,674
Total revenue	$	337,606	$	331,856	$	222,990

Organization and Summary of Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 113,541	$ 171,043	$ 241,274
Restricted cash	8	10	10
Total as presented in the consolidated statements of cash flows	$ 113,549	$ 171,053	$ 241,284	$ 231,412

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Jan. 31, 2023 USD ($) Reportingunit	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Number of reporting unit for goodwill impairment \| Reportingunit	1
Goodwill impairment	$ 0	$ 0	$ 0
Impairment of long-lived assets	0
Impairment losses on investment	$ 0	$ 0	$ 0
Expected dividend yield	0.00%	0.00%	0.00%
Allowance for credit losses	$ 0	$ 0	$ 0
Write-offs of accounts receivable	$ 0	$ 0	$ 0

Business Combination - Additional Information (Details) - USD ($) $ in Thousands		3 Months Ended	12 Months Ended
	Nov. 05, 2021	Jan. 31, 2022	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Business Acquisition [Line Items]
Goodwill		$ 303,625	$ 303,625	$ 303,625
Revenue			337,606	331,856	$ 222,990
Net loss			$ (65,386)	$ (26,411)	$ (59,786)
Oculii Corp [Member]
Business Acquisition [Line Items]
Date of acquisition				Nov. 05, 2021
Percentage of voting rights	100.00%
Total purchase consideration	$ 355,725
Goodwill	277,024
Intangible assets	32,800
Net assets acquired	$ 45,900
Estimated useful lives			7 years 9 months 18 days
Oculii Corp [Member] \| Post Combination [Member]
Business Acquisition [Line Items]
Revenue		500
Net loss		$ (6,100)
Selling General and Administrative Expenses [Member] \| Oculii Corp [Member]
Business Acquisition [Line Items]
Acquisition related costs				$ 3,800

Business Combination - Summary of Aggregate Purchase Consideration (Details) - Oculii Corp [Member] $ in Thousands	Nov. 05, 2021 USD ($)
Business Acquisition [Line Items]
Cash consideration transferred	$ 355,071
Net working capital adjustment	247
Fair value of stock-based compensation awards attributable to pre-combination services	407
Total purchase consideration	$ 355,725

Business Combination - Summary of Fair Values of Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Nov. 05, 2021	Jan. 31, 2023	Jan. 31, 2022
Business Acquisition [Line Items]
Goodwill		$ 303,625	$ 303,625
Deferred income tax liability, non-current		$ 1,120	$ 1,769
Oculii Corp [Member]
Business Acquisition [Line Items]
Cash and cash equivalents	$ 48,032
Accounts receivable	733
Inventories	194
Prepaid expenses and other current assets	134
Property and equipment	155
Intangible assets	32,800
Goodwill	277,024
Other non-current assets	34
Total assets acquired	359,106
Accounts payable	223
Accrued and other current liabilities	2,193
Deferred income tax liability, non-current	965
Total liabilities assumed	3,381
Total purchase consideration	$ 355,725

Business Combination - Summary of Intangible Assets Acquired in Acquisition (Details) - Oculii Corp [Member] - USD ($) $ in Thousands		12 Months Ended
	Nov. 05, 2021	Jan. 31, 2023
Business Acquisition [Line Items]
Total intangible assets acquired	$ 32,800
Estimated useful lives		7 years 9 months 18 days
Trade Name [Member]
Business Acquisition [Line Items]
Total intangible assets acquired	$ 2,500
Estimated useful lives	7 years
Customer Relationships [Member]
Business Acquisition [Line Items]
Total intangible assets acquired	$ 13,200
Estimated useful lives	9 years
Developed Technology [Member]
Business Acquisition [Line Items]
Total intangible assets acquired	$ 17,100
Estimated useful lives	7 years

Business Combination - Summary of Unaudited Information (Details) - Oculii Corp [Member] - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Business Acquisition [Line Items]
Revenue	$ 333,323	$ 223,497
Net loss	$ (35,330)	$ (78,644)

Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 101,686	$ 20
Unrealized Gains	116	0
Unrealized Losses	(608)	0
Fair Value	101,194	20
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7,872	20
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	7,872	$ 20
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,333
Unrealized Gains	0
Unrealized Losses	0
Fair Value	18,333
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	23,472
Unrealized Gains	50
Unrealized Losses	(224)
Fair Value	23,298
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	18,753
Unrealized Gains	44
Unrealized Losses	(149)
Fair Value	18,648
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	33,256
Unrealized Gains	22
Unrealized Losses	(235)
Fair Value	$ 33,043

Financial Instruments and Fair Value - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 31, 2023 USD ($) Security	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)
Debt Securities, Available-for-Sale [Line Items]
Interest income and realized gains and losses from available-for-sale debt securities \| $	$ 1.7	$ 1.7	$ 3.6
Number of debt securities with unrealized losses for more than twelve months	0
Money Market Funds [Member]
Debt Securities, Available-for-Sale [Line Items]
Number of money market funds with unrealized losses for more than twelve months	0

Financial Instruments and Fair Value - Schedule of Cash Equivalents and Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 101,194	$ 20
Included in cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	7,872	20
Included in marketable debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 93,322	$ 0

Financial Instruments and Fair Value - Summary of Contractual Maturities of Investments (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year	$ 48,016	$ 20
Due in 1 - 5 years	52,414	0
Due in 5 - 7 years	764	0
Total cash equivalents and marketable debt securities	$ 101,194	$ 20

Inventories - Schedule of Inventory (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Inventory Disclosure [Abstract]
Work-in-progress	$ 26,023	$ 25,844
Finished goods	14,463	19,375
Total	$ 40,486	$ 45,219

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Property, Plant and Equipment [Abstract]
Depreciation of property and equipment	$ 3.9	$ 2.8	$ 2.6

Property and Equipment, Net - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 34,177	$ 29,265
Less: accumulated depreciation and amortization	(22,363)	(19,131)
Total property and equipment, net	11,814	10,134
Computer hardware and software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	20,733	16,488
Tools and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	8,325	7,532
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,311	1,243
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,295	2,942
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 513	$ 1,060

Intangible Assets, Net - Additional Information (Detail) - USD ($)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Finite Lived Intangible Assets [Line Items]
Liabilities associated with software license at net present value current	$ 7,059,000	$ 6,001,000
Liabilities associated with software license at net present value noncurrent	9,614,000	1,674,000
Impairment of intangible assets	0	0	$ 0
Amortization expense associate with acquisition-related intangible assets	$ 4,900,000	1,400,000	0
IPR&D [Member]
Finite Lived Intangible Assets [Line Items]
Intangible assets acquired		4,100,000
Estimated economic life	7 years
Software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Software license purchased	$ 24,500,000
Fully amortized software license retired	12,500,000
Amortization expense	$ 7,500,000	$ 6,400,000	$ 6,500,000

Intangible Assets, Net - Summary of Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 71,028	$ 58,993
Accumulated Amortization	(12,531)	(12,691)
Net Carrying Amount	58,497	46,302
Software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	34,128	22,093
Accumulated Amortization	(6,319)	(11,331)
Net Carrying Amount	27,809	10,762
Developed technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,200	21,200
Accumulated Amortization	(3,932)	(904)
Net Carrying Amount	17,268	20,296
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,200	13,200
Accumulated Amortization	(1,833)	(367)
Net Carrying Amount	11,367	12,833
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(447)	(89)
Net Carrying Amount	$ 2,053	$ 2,411

Intangible Assets, Net - Summary of Expected Future Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
2024	$ 13,754
2025	11,996
2026	9,944
2027	5,711
2028	5,711
Thereafter	11,381
Net Carrying Amount	$ 58,497	$ 46,302

Goodwill - Additional Information (Detail)	12 Months Ended
Goodwill - Additional Information (Detail)	Jan. 31, 2023 USD ($) Segment	Jan. 31, 2022 USD ($)	Jan. 31, 2021 USD ($)
Finite Lived Intangible Assets [Line Items]
Number of reportable segments \| Segment	1
Goodwill	$ 303,625,000	$ 303,625,000
Goodwill impairment	$ 0	$ 0	$ 0

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References + Details

Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Payables and Accruals [Abstract]
Accrued employee compensation	$ 22,152	$ 30,044
Accrued product development costs	19,433	10,523
Software license liabilities, current	7,059	6,001
Other accrued liabilities	8,011	5,496
Total accrued and other current liabilities	$ 56,655	$ 52,064

Accrued and Other Current Liabilities - Additional Information (Detail) $ in Millions	12 Months Ended
	Jan. 31, 2023 USD ($)
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 10.9
Cash [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	3.2
Restricted stock units [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 7.7

Leases - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Lessee Lease Description [Line Items]
Increase to operating lease liabilities	$ 0.8	$ 4.4
Increase to operating lease ROU assets	0.8	4.4
Operating lease expense	$ 3.7	$ 3.5	$ 3.0
Weighted-average remaining lease term - operating leases	2 years 7 months 9 days
Weighted-average discount rate - operating leases	3.58%
Shanghai [Member] \| Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Lease commencement date		Dec. 01, 2021
Expiration date		Nov. 30, 2024
Lease term		3 years
Shanghai [Member] \| Additional Office Space [Member]
Lessee Lease Description [Line Items]
Lease commencement date		Aug. 01, 2021
Expiration date		Nov. 30, 2024
Lease term		40 months
Shenzhen and Santa Clara [Member] \| Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Lease commencement date	Oct. 01, 2022
Expiration date	Sep. 30, 2024
Lease term	2 years
Hong Kong [Member] \| Extended Office Lease [Member]
Lessee Lease Description [Line Items]
Lease commencement date		Dec. 01, 2021
Expiration date		Nov. 30, 2026
Lease term		5 years

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 4,011	$ 3,608
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	319	365
Leased assets changes arising from lease modifications	$ 575	$ 2,798

Leases - Schedule of Future Minimum Lease Payments for Lease Liabilities (Detail) $ in Thousands	Jan. 31, 2023 USD ($)
Leases [Abstract]
2024	$ 3,766
2025	3,420
2026	1,370
2027	299
2028	125
Thereafter	0
Total future annual minimum lease payments	8,980
Less: interest	(344)
Total lease liabilities	$ 8,636

Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Other Liabilities Disclosure [Abstract]
Unrecognized tax benefits, including interest	$ 3,770	$ 9,313
Deferred income tax liability, non-current	1,120	1,769
Software license liabilities, non-current	9,614	1,674
Other long-term liabilities	1,044	7
Total other long-term liabilities	$ 15,548	$ 12,763

Capital Stock - Additional Information (Detail) - USD ($)		12 Months Ended
	Mar. 16, 2020	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Class Of Stock [Line Items]
Preference shares, shares authorized		20,000,000	20,000,000
Preference shares, par value		$ 0.00045	$ 0.00045
Preference shares, shares issued		0	0
Preference shares, shares outstanding		0	0
Stock repurchased, shares		0	0
Stock repurchased during period, cash		$ 0	$ 0	$ 1,000,000
Stock Repurchase Program $50.0 Million Authorization [Member]
Class Of Stock [Line Items]
Stock repurchase program, expiration date		Jun. 30, 2023
Stock repurchased, shares	25,719
Stock repurchased during period, cash	$ 1,000,000.0
Amount available under stock repurchase program		$ 49,000,000.0
Stock Repurchase Program $50.0 Million Authorization [Member] \| Maximum [Member]
Class Of Stock [Line Items]
Amount authorized under stock repurchase program	$ 50,000,000.0

Capital Stock - Schedule of Ordinary Shares Reserved for Future Issuance under Company's Equity Plans and Employee Stock Purchase Plan (Detail) - shares	Jan. 31, 2023	Jan. 31, 2022
Equity Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	5,822,819	7,461,541
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	2,986,403	2,624,704

Employee Benefits and Stock-based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended			2 Months Ended	3 Months Ended		12 Months Ended
	Apr. 30, 2022	Nov. 30, 2021	Jun. 30, 2021	Jun. 30, 2021	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Contribution expense							$ 0.8	$ 0.6
Voting power of all classes of company's shares							10.00%
Accrued stock-based compensation expense liabilities							$ 4.6	$ 7.8
Closing price of stock							$ 89.84
Mr. Casey Eichler [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Acceleration of vesting of shares of unvested equity awards	35,703
Additional stock-based compensation expense, net related to departure recognized							$ 1.7
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Option's term of up to 10 years from grant date							10 years	10 years	10 years
Vesting schedule							vest 25% on the first anniversary service date of the grant and the remainder vest ratably over the following 36 months.
Total unrecognized compensation cost, stock options							$ 15.9
Weighted average recognition period							1 year 10 months 6 days
Restricted Stock and Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting schedule							1/4th of the shares on the first anniversary service date of the grant and 1/16th of the shares vest every 3 months thereafter, so as to be 100% vested on the fourth anniversary of the vesting commencement date.
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Weighted average recognition period							2 years 4 months 28 days
Total unrecognized compensation cost, restricted stock units							$ 189.7
Aggregate intrinsic value of unvested restricted stock units							231.2
Total fair value of vesting dates of restricted stock units vested							$ 122.0	$ 192.5	$ 69.0
2021 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Ordinary shares reserved for issuance			1,350,000
Maximum number of ordinary shares reserved for issuance			6,834,208	6,834,208
2012 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional ordinary shares reserved for issuance				0		1,599,634
2017 Stock Option Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional ordinary shares reserved for issuance		0
Incentive stock options granted to 10% ownership [Member] \| Stock options [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase price of ordinary shares, percentage							110.00%
Non statutory stock options and incentive stock options granted to less than 10% ownership [Member] \| Stock options [Member] \| Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase price of ordinary shares, percentage							100.00%
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Purchase price of ordinary shares, percentage							85.00%	85.00%	85.00%
Percentage of salary contribution by employees							15.00%
Additional ordinary shares reserved for issuance					466,285	444,343
ESPP [Member] \| Scenario, plan automatically increased by the lessor of [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Annual increase in ordinary shares for available for future issuance					1,500,000	1,500,000
Annual shares increase for future issuance by percentage under 2012 employee stock purchase plan					1.25%	1.25%

Employee Benefits and Stock-based Compensation - Classification of Stock-based Compensation (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Stock-based compensation:
Total stock-based compensation	$ 111,158	$ 87,801	$ 70,134
Cost of revenue [Member]
Stock-based compensation:
Total stock-based compensation	3,597	1,489	1,328
Research and development [Member]
Stock-based compensation:
Total stock-based compensation	71,236	54,787	42,903
Selling, general and administrative [Member]
Stock-based compensation:
Total stock-based compensation	$ 36,325	$ 31,525	$ 25,903

Employee Benefits and Stock-based Compensation - Weighted-Average Assumptions Used to Estimate Fair Value (Detail)	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Dividend yield	0.00%	0.00%	0.00%
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility	0.00%	51.00%	52.00%
Risk-free interest rate	0.00%	1.04%	0.52%
Expected term (years)		5 years 21 days	5 years 9 months 10 days
Dividend yield	0.00%	0.00%	0.00%
Employee stock purchase plan awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility	81.00%	57.00%	59.00%
Risk-free interest rate	2.32%	0.06%	0.21%
Expected term (years)	6 months	6 months	6 months
Dividend yield	0.00%	0.00%	0.00%

Employee Benefits and Stock-based Compensation - Stock Option Activities (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Share-Based Payment Arrangement [Abstract]
Shares, Outstanding	619,322	719,143	1,124,646
Shares, Granted		14,700	51,200
Shares, Assumed		163,581
Shares, Exercised	(121,624)	(269,287)	(421,736)
Shares, Forfeited	(10,618)	(7,669)	(11,618)
Shares, Expired	(2,289)	(1,146)	(23,349)
Shares, Outstanding	484,791	619,322	719,143
Shares, Exercisable	370,158
Weighted-Average Exercise Price, Outstanding	$ 40.08	$ 38.33	$ 32.93
Weighted-Average Exercise Price, Granted		110.19	59.54
Weighted-Average Exercise Price, Assumed		23.10
Weighted-Average Exercise Price, Exercised	30.34	28.23	24.52
Weighted-Average Exercise Price, Forfeited	55.97	68.95	46.69
Weighted-Average Exercise Price, Expired	39.19	9.86	70.11
Weighted-Average Exercise Price, Outstanding	42.18	40.08	38.33
Weighted-Average Exercise Price, Exercisable	$ 44.47
Weighted-Average Grant-date Fair Value, Granted		50.28	$ 28.37
Weighted-Average Acquisition-date Fair Value, Assumed		$ 173.04
Total Intrinsic Value of options Exercised	$ 6,712	$ 25,622	$ 19,401
Weighted-Average Remaining Contractual Term, Outstanding	4 years 4 months 17 days
Weighted-Average Remaining Contractual Term, Exercisable	3 years 7 months 2 days
Aggregate Intrinsic Value, Outstanding	$ 23,346
Aggregate Intrinsic Value, Exercisable	$ 16,927

Employee Benefits and Stock-based Compensation - Restricted Stock Unit Activities (Detail) - Restricted Stock Units [Member] - $ / shares	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Unvested, beginning balance	2,651,135	2,871,801	2,617,266
Shares, Granted	1,549,174	1,213,257	1,499,203
Shares, Vested	(1,513,972)	(1,367,309)	(1,162,883)
Shares, Forfeited	(112,978)	(66,614)	(81,785)
Shares, Unvested, ending balance	2,573,359	2,651,135	2,871,801
Weighted-Average Grant-Date Fair Value, Unvested, beginning balance	$ 85.41	$ 51.73	$ 50.30
Weighted-Average Grant-Date Fair Value, Granted	74.45	128.80	53.45
Weighted-Average Grant-Date Fair Value, Vested	71.32	53.85	50.53
Weighted-Average Grant-Date Fair Value, Forfeited	99.46	71.59	54.48
Weighted-Average Grant-Date Fair Value, Unvested, ending balance	$ 86.81	$ 85.41	$ 51.73

Net Loss Per Ordinary Share - Computation of Basic and Diluted Net Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Numerator:
Net loss	$ (65,386)	$ (26,411)	$ (59,786)
Denominator:
Weighted-average ordinary shares - basic	38,363,638	36,577,120	34,679,717
Weighted-average ordinary shares - diluted	38,363,638	36,577,120	34,679,717
Net loss per ordinary share:
Basic	$ (1.70)	$ (0.72)	$ (1.72)
Diluted	$ (1.70)	$ (0.72)	$ (1.72)

- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

+ References

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

+ References

+ Details

Net Loss Per Ordinary Share - Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Ordinary Share (Detail) - shares	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	1,898,390	1,724,742	2,127,990
Options to purchase ordinary shares [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	336,828	327,747	660,025
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	1,550,679	1,388,091	1,440,176
Employee stock purchase plan awards [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	10,883	8,904	27,789

Income Taxes - Summary of Loss before Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Results of Operations, Income before Income Taxes [Abstract]
U.S. operations	$ (18,968)	$ (5,842)	$ 8
Non-U.S. operations	(51,970)	(22,799)	(57,311)
Loss before income taxes	$ (70,938)	$ (28,641)	$ (57,303)

- Definition

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 940
-SubTopic 20
-Section 25
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=126941158&loc=d3e41242-110953

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section 50
-Paragraph 22
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(10))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(8))
-URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 9: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 31
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599

Reference 10: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(15))
-URI https://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260

+ Details

Income Taxes - Schedule of Income Tax Provision (Benefit) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Current:
U.S. federal tax	$ (3,525)	$ 907	$ 1,705
U.S. state taxes	175	0	256
Non-U.S. foreign taxes	2,395	1,778	1,019
Current income tax provision	(955)	2,685	2,980
Deferred:
U.S. federal tax	(4,231)	(4,819)	(432)
U.S. state taxes	0	(14)	0
Non-U.S. foreign taxes	(366)	(82)	(65)
Deferred income tax provision	(4,597)	(4,915)	(497)
Provision (benefit) for income taxes	$ (5,552)	$ (2,230)	$ 2,483

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Income Taxes [Line Items]
Statutory tax rate	21.00%	21.00%	21.00%
Deferred tax liabilities, not recognized	$ 15,600
Cumulative undistributed earnings of foreign subsidiaries	107,900
Gross deferred tax assets, net of deferred tax liabilities before valuation allowance	46,600	$ 37,700
Valuation allowance	28,596	24,083
Unrecognized tax benefits	21,656	30,884	$ 29,527	$ 42,695
Unrecognized tax benefits that would impact effective tax rate	14,800
Interest expense and penalties related to uncertain tax positions	(700)	300	$ 300
Noncurrent liabilities related to interest and penalties for uncertain tax positions	600	1,300
Decreased unrecognized tax benefits	9,200
Unrecognized tax benefits gross	21,700
Long term income taxes payable, including estimated interest and penalties	3,800
Other Long-Term Liabilities [Member]
Income Taxes [Line Items]
Income tax liabilities considered as other long term liabilities	3,200	$ 8,000
U.S. state tax authorities [Member]
Income Taxes [Line Items]
Valuation allowance	$ 24,500
U.S. state tax authorities [Member] \| Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2019
U.S. state tax authorities [Member] \| Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2023
U.S. federal tax authorities [Member]
Income Taxes [Line Items]
Valuation allowance	$ 4,100
U.S. federal tax authorities [Member] \| Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2020
U.S. federal tax authorities [Member] \| Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2023
Foreign tax authorities [Member] \| Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2016
Foreign tax authorities [Member] \| Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2023
California state [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	$ 1,000
Net operating loss carryforwards begin to expire in fiscal year	2040
Research and development credit carryforwards	$ 37,500
Federal [Member]
Income Taxes [Line Items]
Net operating loss carryforwards	$ 31,400
Net operating loss carryforwards begin to expire in fiscal year	2037
Research and development credit carryforwards	$ 27,500
Federal credits begin to expire in fiscal year	2037

Income Taxes - Schedule of Reconciliation Between the Provision (Benefit) for Income Taxes at the Statutory Rate and the Effective Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Provision at U.S. notional statutory rate	$ (14,897)	$ (6,015)	$ (12,034)
U.S. state taxes	114	(11)	212
Non-U.S. foreign tax differential	12,943	6,483	12,989
Stock-based compensation	10,004	1,900	4,943
U.S. R&D credit	(5,045)	(5,886)	(3,928)
Valuation allowance	2,124	765	0
FIN48 interest	(739)	311	0
Uncertain tax position release	(10,188)	0	0
Other	132	223	301
Provision (benefit) for income taxes	$ (5,552)	$ (2,230)	$ 2,483

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Deferred tax assets:
Federal and state credits	$ 40,134	$ 33,485
Net operating losses	6,659	7,466
Expenses not currently deductible	3,164	1,294
Operating lease liabilities	1,582	2,096
Stock-based compensation	3,678	3,632
Foreign deferred	262	191
Gross deferred tax assets	55,479	48,164
Valuation allowance	(28,596)	(24,083)
Total deferred tax assets	26,883	24,081
Deferred tax liabilities
Intangible assets	(6,782)	(8,150)
Property and equipment	(617)	(386)
Operating lease assets	(1,452)	(1,971)
Net deferred tax assets	$ 18,032	$ 13,574

Income Taxes - Summary of Tax Valuation Allowance (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 24,083
Balance at End of Period	28,596	$ 24,083
Valuation Allowance of Deferred Tax Assets [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	24,083	17,962	$ 14,670
Additional Charged to Expenses	4,513	4,874	3,292
Additions Charged to Other Account	0	1,247	0
Deductions Charged to Expenses or Other Accounts	0	0	0
Balance at End of Period	$ 28,596	$ 24,083	$ 17,962

Income Taxes - Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Income Tax Disclosure [Abstract]
Beginning balance	$ 30,884	$ 29,527	$ 42,695
Additions based on tax positions related to the current year	1,033	1,412	3,360
Additions for tax positions of prior years	195	55	16
Reductions for tax positions in prior years	(45)	0	(10,212)
Settlements for prior periods	0	0	(6,087)
Lapse of applicable statute of limitations	(10,411)	(110)	(245)
Ending balance	$ 21,656	$ 30,884	$ 29,527

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Jan. 31, 2023	Jan. 31, 2022
Loss Contingencies [Line Items]
Total manufacturing purchase commitments	$ 43,600,000	$ 71,500,000
Loss recognized from adverse purchase commitments	2,900,000	0
Indemnification agreement [Member]
Loss Contingencies [Line Items]
Payments under indemnification obligations	0
Liabilities recorded under indemnification obligations	0	0
Other Matters [Member]
Loss Contingencies [Line Items]
Liabilities recorded under indemnification obligations	$ 0	$ 0

Segment Reporting - Additional Information (Detail) $ in Thousands	12 Months Ended
	Jan. 31, 2023 USD ($) Segment	Jan. 31, 2022 USD ($)	Jan. 31, 2021
Concentration Risk [Line Items]
Number of reportable segments \| Segment	1
Property and equipment, net	$ 11,814	$ 10,134
Accounts receivable	$ 51,987	$ 44,307
Sales revenue, net [Member] \| Wintech [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	57.00%	62.00%	63.00%
Sales revenue, net [Member] \| Chicony [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	12.00%	13.00%	16.00%
Accounts receivable [Member] \| Wintech [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 21,000	$ 23,300
Accounts receivable [Member] \| Chicony [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	9,400	7,400
United States [Member]
Concentration Risk [Line Items]
Property and equipment, net	4,000	3,100
Asia Pacific [Member]
Concentration Risk [Line Items]
Property and equipment, net	6,300	5,600
Europe [Member]
Concentration Risk [Line Items]
Property and equipment, net	$ 1,500	$ 1,500

Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2023	Jan. 31, 2022	Jan. 31, 2021
Revenue from External Customer [Line Items]
Total revenue	$ 337,606	$ 331,856	$ 222,990
Taiwan [Member]
Revenue from External Customer [Line Items]
Total revenue	203,828	209,044	139,327
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	73,371	81,480	57,270
Europe [Member]
Revenue from External Customer [Line Items]
Total revenue	25,065	17,823	9,415
North America other than United States [Member]
Revenue from External Customer [Line Items]
Total revenue	23,164	18,191	10,304
United States [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 12,178	$ 5,318	$ 6,674

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
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-Paragraph 32
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
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-Paragraph 4
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-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130543-203045

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
-Topic 280
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-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
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-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI https://asc.fasb.org/extlink&oid=126920106&loc=SL49130545-203045

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

+ Details

Subsequent Event - Additional Information (Detail) $ in Millions	Mar. 10, 2023 USD ($)
Subsequent Event [Member] \| Silicon Valley Bank [Member]
Subsequent Event [Line Items]
Cash deposits	$ 17.0

Financial Instruments and Fair Value - Schedule of Fair Value of Financial Instruments Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	$ 101,194	$ 20
Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	7,872	20
Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	18,333
Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	23,298
Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	18,648
U.S. government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	33,043
Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	7,872	20
Level 1 [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	7,872	20
Level 1 [Member] \| Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 1 [Member] \| Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 1 [Member] \| Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 1 [Member] \| U.S. government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	93,322	0
Level 2 [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0	0
Level 2 [Member] \| Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	18,333
Level 2 [Member] \| Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	23,298
Level 2 [Member] \| Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	18,648
Level 2 [Member] \| U.S. government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	33,043
Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0	0
Level 3 [Member] \| Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0	$ 0
Level 3 [Member] \| Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 3 [Member] \| Corporate bonds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 3 [Member] \| Asset-backed securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	0
Level 3 [Member] \| U.S. government securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	$ 0