0000950170-23-068983 | 10-Q | XBRL Viewer

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Net Loss Per Ordinary Share - Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Net Loss Per Ordinary Share (Detail) - shares	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	1,792,889	1,733,191	1,628,631	1,911,967
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	214,595	314,645	242,277	351,595
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	1,560,921	1,408,315	1,374,705	1,549,473
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	17,373	10,231	11,649	10,899

Property and Equipment, Net (Tables)

9 Months Ended

Oct. 31, 2023

Property, Plant and Equipment [Abstract]

Schedule of Property and Equipment

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


	As of
	October 31, 2023			January 31, 2023
	(in thousands)
Computer hardware and software	$	22,869		$	20,733
Tools and equipment		8,174			8,325
Furniture and fixtures		1,347			1,311
Leasehold improvements		3,414			3,295
Construction in progress		422			513
		36,226			34,177
Less: accumulated depreciation and amortization		(25,309	)		(22,363	)
Total property and equipment, net	$	10,917		$	11,814

Financial Instruments and Fair Value

9 Months Ended

Oct. 31, 2023

Investments, All Other Investments [Abstract]

Financial Instruments and Fair Value

2. Financial Instruments and Fair Value

The Company invests a portion of its cash in money market funds and debt securities that are denominated in United States dollars. The debt security investment portfolio consists of commercial paper, corporate bonds, asset-backed securities and U.S. government securities. All of the investments are classified as available-for-sale securities and reported at fair value in the condensed consolidated balance sheets as follows:


	As of October 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	1,649	$	—	$	—		$	1,649
Commercial paper		22,963		—		—			22,963
Corporate bonds		40,667		7		(642	)		40,032
Asset-backed securities		17,269		—		(256	)		17,013
U.S. government securities		22,491		—		(328	)		22,163
Total cash equivalents and marketable debt securities	$	105,039	$	7	$	(1,226	)	$	103,820

	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

The following table provides the breakdown of unrealized losses as of October 31, 2023, aggregated by investment category and length of time that individual securities have been in a continuous loss position:


	As of October 31, 2023
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(in thousands)
Corporate bonds	$	29,661	$	(406	)	$	9,098	$	(236	)	$	38,759	$	(642	)
Asset-backed securities		9,550		(87	)		7,463		(169	)		17,013		(256	)
U.S. government securities		14,761		(185	)		7,402		(143	)		22,163		(328	)
Total marketable debt securities at loss position	$	53,972	$	(678	)	$	23,963	$	(548	)	$	77,935	$	(1,226	)

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Included in cash equivalents	$	25,271	$	7,872
Included in marketable debt securities		78,549		93,322
Total cash equivalents and marketable debt securities	$	103,820	$	101,194

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Due within one year	$	39,736	$	48,016
Due in 1 - 5 years		64,084		52,414
Due in 5 - 7 years		—		764
Total cash equivalents and marketable debt securities	$	103,820	$	101,194

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 condensed 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 condensed consolidated balance sheets. The credit-related losses were not material for the three and nine months ended October 31, 2023 and 2022, 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 condensed consolidated statements of operations. For the three months ended October 31, 2023 and 2022, interest income and realized gains and losses, net, were approximately $1.3 million and $0.7 million, respectively. For the nine months ended October 31, 2023 and 2022, interest income and realized gains and losses, net, were approximately $3.5 million and $0.8 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 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 assets in active markets and are classified within Level 2.

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


	As of October 31, 2023
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	1,649	$	1,649	$	—	$	—
Commercial paper		22,963		—		22,963		—
Corporate bonds		40,032		—		40,032		—
Asset-backed securities		17,013		—		17,013		—
U.S. government securities		22,163		—		22,163		—
Total cash equivalents and marketable debt securities	$	103,820	$	1,649	$	102,171	$	—

	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	$	—

Stock-based Compensation - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2024	Oct. 31, 2023	Oct. 31, 2023
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities		$ 1,400,000	$ 1,400,000
Closing price of ordinary shares		$ 44.99	$ 44.99
Mr. Brian White [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Additional stock-based compensation expense, net related to departure recognized	$ 1,900,000	$ 200,000
Mr. Brian White [Member] \| Forecast [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Acceleration of vesting of shares of unvested equity awards	24,559
Additional stock-based compensation expense, net related to departure recognized	$ 693,000
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, stock options		8,300,000	$ 8,300,000
Weighted average recognition period			1 year 5 months 12 days
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units		188,000,000	$ 188,000,000
Weighted average recognition period			2 years 6 months 21 days
Aggregate intrinsic value of unvested restricted stock units		$ 120,000,000.0	$ 120,000,000.0

Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Oct. 31, 2023	Nov. 30, 2023
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Oct. 31, 2023
Document Fiscal Year Focus	2024
Document Fiscal Period Focus	Q3
Trading Symbol	AMBA
Entity Registrant Name	AMBARELLA, INC.
Entity Central Index Key	0001280263
Current Fiscal Year End Date	--01-31
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Current Reporting Status	Yes
Entity Common Stock, Shares Outstanding		40,248,073
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
Document Quarterly Report	true
Document Transition Report	false
Title of 12(b) Security	Ordinary Shares, $0.00045 Par Value Per Share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes

Financial Instruments and Fair Value - Summary of Contractual Maturities of Investments (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Debt Securities, Available-for-Sale, Fair Value, Fiscal Year Maturity [Abstract]
Due within one year	$ 39,736	$ 48,016
Due in 1 - 5 years	64,084	52,414
Due in 5 - 7 years	0	764
Total cash equivalents and marketable debt securities	$ 103,820	$ 101,194

Stock-based Compensation - Classification of Stock-based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Stock-based compensation:
Total stock-based compensation	$ 27,409	$ 28,101	$ 82,796	$ 82,051
Cost of revenue [Member]
Stock-based compensation:
Total stock-based compensation	868	360	2,694	1,071
Research and development [Member]
Stock-based compensation:
Total stock-based compensation	17,898	18,741	54,809	53,775
Selling, general and administrative [Member]
Stock-based compensation:
Total stock-based compensation	$ 8,643	$ 9,000	$ 25,293	$ 27,205

Income Taxes - Summary of Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (40,065)	$ (18,697)	$ (108,923)	$ (49,323)
Provision (benefit) for income taxes	$ 1,645	$ 1,112	$ (113)	$ 4,958
Effective tax rate	(4.10%)	(6.00%)	0.10%	(10.10%)

- 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.

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+ Details

- Definition

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References + Details

Financial Instruments and Fair Value - Schedule of Cash Equivalents and Marketable Debt Securities (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 103,820	$ 101,194
Included in cash equivalents [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	25,271	7,872
Included in marketable debt securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total cash equivalents and marketable debt securities	$ 78,549	$ 93,322

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Commitments and Contingencies - Additional Information (Detail) - USD ($)	Oct. 31, 2023	Jan. 31, 2023
Loss Contingencies [Line Items]
Total manufacturing purchase commitments	$ 26,200,000	$ 43,600,000
Liabilities of purchase commitments		2,900,000
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

Property and Equipment, Net

9 Months Ended

Oct. 31, 2023

Property, Plant and Equipment [Abstract]

Property and Equipment, Net

4. Property and Equipment, Net

Depreciation expense was approximately $1.2 million and $1.0 million for the three months ended October 31, 2023 and 2022, respectively, and was approximately $3.5 million and $2.8 million for the nine months ended October 31, 2023 and 2022, respectively. Property and equipment at October 31, 2023 and January 31, 2023 consisted of the following:


	As of
	October 31, 2023			January 31, 2023
	(in thousands)
Computer hardware and software	$	22,869		$	20,733
Tools and equipment		8,174			8,325
Furniture and fixtures		1,347			1,311
Leasehold improvements		3,414			3,295
Construction in progress		422			513
		36,226			34,177
Less: accumulated depreciation and amortization		(25,309	)		(22,363	)
Total property and equipment, net	$	10,917		$	11,814

Leases

9 Months Ended

Oct. 31, 2023

Leases [Abstract]

Leases

7. Leases

The Company enters into various operating leases for its worldwide facilities. The operating lease expense was approximately $1.0 million and $1.0 million for the three months ended October 31, 2023 and 2022, respectively, and was approximately $2.8 million and $2.8 million for the nine months ended October 31, 2023 and 2022, respectively. The Company's short-term leases and finance leases were not material as of October 31, 2023 and January 31, 2023, respectively.

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


	Three Months Ended		Nine Months Ended
	October 31, 2023		October 31, 2023
	(in thousands)
Cash paid for operating leases included in operating cash flows	$	947	$	2,940
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		51		171

As of October 31, 2023, the weighted average remaining lease term is 1.95 years, and the weighted average discount rate is 3.62 percent. Future minimum lease payments for the lease liabilities are as follows:


	As of
	October 31, 2023
Fiscal Year	(in thousands)
2024 (3 months remaining)	$	936
2025		3,353
2026		1,364
2027		289
2028		100
Thereafter		—
Total future annual minimum lease payments		6,042
Less: interest		(173	)
Total lease liabilities	$	5,869

Organization and Summary of Significant Accounting Policies

9 Months Ended

Oct. 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 Presentation

The accompanying unaudited condensed consolidated financial statements have been prepared by the Company in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission (SEC) and, therefore, do not include all information and notes normally provided in audited financial statements. The accounting policies are described in the “Notes to Consolidated Financial Statements” in the Annual Report on Form 10-K for the 2023 fiscal year filed with the SEC on March 31, 2023 (the Form 10-K) and updated, as necessary, in this Form 10-Q. The year-end condensed consolidated balance sheet data presented for comparative purposes was derived from audited financial statements, but does not include all disclosures required by generally accepted accounting principles in the United States (U.S. GAAP). In the opinion of management, all adjustments (consisting of normal recurring accruals and adjustments) considered necessary for a fair statement have been included. The results of operations for any interim period are not necessarily indicative of, nor comparable to, the results of operations for any other interim period or for a full fiscal year. These unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes contained in the Form 10-K.

Basis of Consolidation

The Company’s fiscal year ends on January 31. The condensed 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.

Significant Accounting Policies

There have been no material changes to the Company’s significant accounting policies described in Note 1 - Organization and Summary of Significant Accounting Policies, of the Notes to Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the fiscal year ended January 31, 2023.

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 its two major distributors, WT Microelectronics Co., Ltd., formerly Wintech Microelectronics Co., Ltd., or WT, which serves as its non-exclusive sales representative and fulfillment partner in Asia other than Japan, and Hakuto Co., Ltd., or Hakuto, a Japan distributor, and to one ODM, Chicony Electronics Co., Ltd., or Chicony, which manufactures devices incorporating the Company’s solutions on behalf of multiple end-customers. 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 14 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, 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.

Restricted Cash

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


	As of
	October 31, 2023		January 31, 2023		October 31, 2022		January 31, 2022
	(in thousands)
Cash and cash equivalents	$	143,787	$	113,541	$	112,837	$	171,043
Restricted cash		7		8		7		10
Total as presented in the condensed consolidated statements of cash flows	$	143,794	$	113,549	$	112,844	$	171,053

Recent Accounting Pronouncements

None.

Segment Reporting

9 Months Ended

Oct. 31, 2023

Segment Reporting [Abstract]

Segment Reporting

14. 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. Certain prior quarter amounts of revenue by geographic region have been adjusted to reflect the appropriate bill-to location for the related revenue. These adjustments did not impact the total revenues in any of the periods presented.


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
	(in thousands)
Taiwan	$	27,179	$	51,306	$	91,295	$	150,595
Asia Pacific		14,300		15,309		45,378		54,724
Europe		2,869		5,310		9,058		18,472
North America other than United States		5,032		8,870		24,407		21,930
United States		1,215		2,301		4,720		8,564
Total revenue	$	50,595	$	83,096	$	174,858	$	254,285

Substantially all of the Company’s property and equipment were located in the Asia Pacific region, United States and Europe. As of October 31, 2023, the net amount of these fixed assets located in these regions was approximately $5.7 million, $3.9 million and $1.3 million, respectively. 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.

Major Customers

For the three months ended October 31, 2023, the customers representing 10% or more of revenue were WT, Hakuto and Chicony, which accounted for approximately 53.7%, 12.0% and 11.7% of total revenue, respectively. For the nine months ended October 31, 2023, the customers representing 10% or more of revenue were WT and Chicony, which accounted for approximately 52.2% and 13.9% of total revenue, respectively. For the three and nine months ended October 31, 2022, the customers representing 10% or more of revenue were WT and Chicony, which accounted for approximately 61.6% and 10.7% of total revenue for the three months ended October 31, 2022, respectively, and accounted for approximately 59.1% and 11.6% of total revenue for the nine months ended October 31, 2022, respectively. Accounts receivable with WT, Chicony and Hakuto were approximately $8.1 million, $6.0 million and $1.1 million as of October 31, 2023, 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

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-Topic 280
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-Section 50
-Paragraph 22
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+ Details

Leases - Schedule of Future Minimum Lease Payments for Lease Liabilities (Detail) $ in Thousands	Oct. 31, 2023 USD ($)
Leases [Abstract]
2024 (3 months remaining)	$ 936
2025	3,353
2026	1,364
2027	289
2028	100
Thereafter	0
Total future annual minimum lease payments	6,042
Less: interest	(173)
Total lease liabilities	$ 5,869

Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities at Fair Value (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 105,039	$ 101,686
Unrealized Gains	7	116
Unrealized Losses	(1,226)	(608)
Fair Value	103,820	101,194
Money market funds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1,649	7,872
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	1,649	7,872
Commercial paper [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,963	18,333
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	22,963	18,333
Corporate bonds [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	40,667	23,472
Unrealized Gains	7	50
Unrealized Losses	(642)	(224)
Fair Value	40,032	23,298
Asset-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	17,269	18,753
Unrealized Gains	0	44
Unrealized Losses	(256)	(149)
Fair Value	17,013	18,648
U.S. government securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	22,491	33,256
Unrealized Gains	0	22
Unrealized Losses	(328)	(235)
Fair Value	$ 22,163	$ 33,043

Net Loss Per Ordinary Share - Computation of Basic and Diluted Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						9 Months Ended
	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2023	Oct. 31, 2022
Numerator:
Net loss	$ (41,710)	$ (31,198)	$ (35,902)	$ (19,809)	$ (23,650)	$ (10,822)	$ (108,810)	$ (54,281)
Denominator:
Weighted-average ordinary shares - basic	40,053,251			38,582,584			39,710,248	38,185,421
Weighted-average ordinary shares - diluted	40,053,251			38,582,584			39,710,248	38,185,421
Net loss per ordinary share:
Basic	$ (1.04)			$ (0.51)			$ (2.74)	$ (1.42)
Diluted	$ (1.04)			$ (0.51)			$ (2.74)	$ (1.42)

- Definition

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

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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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- Definition

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

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-Name Accounting Standards Codification
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-Section S99
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-URI https://asc.fasb.org//1943274/2147483589/942-220-S99-1

+ Details

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Statement of Comprehensive Income [Abstract]
Net loss	$ (41,710)	$ (19,809)	$ (108,810)	$ (54,281)
Other comprehensive loss, net of tax:
Net unrealized losses on investments	(289)	(1,041)	(727)	(1,043)
Other comprehensive loss, net of tax	(289)	(1,041)	(727)	(1,043)
Comprehensive loss	$ (41,999)	$ (20,850)	$ (109,537)	$ (55,324)

- Definition

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

+ References

+ Details

Other Long-Term Liabilities (Tables)

9 Months Ended

Oct. 31, 2023

Other Liabilities Disclosure [Abstract]

Schedule of Other Long-Term Liabilities

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Unrecognized tax benefits, including interest	$	3,848	$	3,770
Deferred tax liabilities, non-current		1,018		1,120
Software license liabilities, non-current		9,827		9,614
Other long-term liabilities		3		1,044
Total other long-term liabilities	$	14,696	$	15,548

Financial Instruments and Fair Value - Schedule of Available-for-Sale Securities Unrealized Loss Position at Fair Value (Detail) $ in Thousands	Oct. 31, 2023 USD ($)
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	$ 53,972
12 Months or Greater, Fair Value	23,963
Total, Fair Value	77,935
Less than 12 Months, Unrealized Losses	(678)
12 Months or Greater, Unrealized Losses	(548)
Total, Unrealized Losses	(1,226)
Corporate bonds [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	29,661
12 Months or Greater, Fair Value	9,098
Total, Fair Value	38,759
Less than 12 Months, Unrealized Losses	(406)
12 Months or Greater, Unrealized Losses	(236)
Total, Unrealized Losses	(642)
Asset-backed securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	9,550
12 Months or Greater, Fair Value	7,463
Total, Fair Value	17,013
Less than 12 Months, Unrealized Losses	(87)
12 Months or Greater, Unrealized Losses	(169)
Total, Unrealized Losses	(256)
U.S. government securities [Member]
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items]
Less than 12 Months, Fair Value	14,761
12 Months or Greater, Fair Value	7,402
Total, Fair Value	22,163
Less than 12 Months, Unrealized Losses	(185)
12 Months or Greater, Unrealized Losses	(143)
Total, Unrealized Losses	$ (328)

Goodwill and Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022	Jan. 31, 2023
Finite Lived Intangible Assets [Line Items]
Liabilities associated with software license at net present value, current	$ 8,466,000		$ 8,466,000		$ 7,059,000
Liabilities associated with software license at net present value, non-current	9,827,000		9,827,000		$ 9,614,000
Unamortized software licenses with alternative uses to be sold, leased or marketed	9,400,000		9,400,000
Impairment of goodwill and intangible assets	0	$ 0	0	$ 0
Software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense	3,100,000	2,000,000	8,500,000	5,200,000
Acquired Intangible Assets [Member]
Finite Lived Intangible Assets [Line Items]
Amortization expense	$ 1,200,000	$ 1,200,000	3,600,000	$ 3,600,000
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Software licenses purchased			12,500,000
Fully amortized software license retired			$ 2,200,000

Pay vs Performance Disclosure - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
Pay vs Performance Disclosure - USD ($) $ in Thousands	Oct. 31, 2023	Jul. 31, 2023	Apr. 30, 2023	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2023	Oct. 31, 2022
Pay vs Performance Disclosure
Net Income (Loss)	$ (41,710)	$ (31,198)	$ (35,902)	$ (19,809)	$ (23,650)	$ (10,822)	$ (108,810)	$ (54,281)

- Definition

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

+ References

+ Details

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2023	Oct. 31, 2023
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 947	$ 2,940
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$ 51	$ 171

Capital Stock

9 Months Ended

Oct. 31, 2023

Equity [Abstract]

Capital Stock

9. 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 October 31, 2023 and January 31, 2023, respectively.

Ordinary shares

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


	As of
	October 31, 2023		January 31, 2023
Shares reserved for options, restricted stock and restricted stock units under equity plans		4,783,996		5,822,819
Shares reserved for employee stock purchase plan		2,834,384		2,986,403

Stock repurchase program

On May 26, 2023, the Company’s Board of Directors approved an extension of the Company's existing share repurchase program for an additional twelve months through June 30, 2024. There were no ordinary shares repurchased in the nine months ended October 31, 2023. As of October 31, 2023, there was approximately $49.0 million available for repurchases under the current repurchase program through June 30, 2024. Repurchases 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. The repurchase program is funded using the Company’s working capital and any repurchased shares are recorded as authorized but unissued shares.

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Statement [Abstract]
Revenue	$ 50,595	$ 83,096	$ 174,858	$ 254,285
Cost of revenue	20,612	31,418	68,894	94,996
Gross profit	29,983	51,678	105,964	159,289
Operating expenses:
Research and development	53,702	52,864	163,060	151,892
Selling, general and administrative	18,246	18,944	55,750	58,213
Total operating expenses	71,948	71,808	218,810	210,105
Loss from operations	(41,965)	(20,130)	(112,846)	(50,816)
Other income, net	1,900	(1,433)	3,923	1,493
Loss before income taxes	(40,065)	(18,697)	(108,923)	(49,323)
Provision (benefit) for income taxes	1,645	1,112	(113)	4,958
Net loss	$ (41,710)	$ (19,809)	$ (108,810)	$ (54,281)
Net income loss per share attributable to ordinary shareholders:
Basic	$ (1.04)	$ (0.51)	$ (2.74)	$ (1.42)
Diluted	$ (1.04)	$ (0.51)	$ (2.74)	$ (1.42)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	40,053,251	38,582,584	39,710,248	38,185,421
Diluted	40,053,251	38,582,584	39,710,248	38,185,421

Net Loss Per Ordinary Share (Tables)

9 Months Ended

Oct. 31, 2023

Earnings Per Share [Abstract]

Computation of Basic and Diluted Loss Per Ordinary Share

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
	(in thousands, except share and per share data)
Numerator:
Net loss	$	(41,710	)	$	(19,809	)	$	(108,810	)	$	(54,281	)
Denominator:
Weighted-average ordinary shares - basic		40,053,251			38,582,584			39,710,248			38,185,421
Weighted-average ordinary shares - diluted		40,053,251			38,582,584			39,710,248			38,185,421
Net loss per ordinary share:
Basic	$	(1.04	)	$	(0.51	)	$	(2.74	)	$	(1.42	)
Diluted	$	(1.04	)	$	(0.51	)	$	(2.74	)	$	(1.42	)

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:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
Options to purchase ordinary shares		214,595		314,645		242,277		351,595
Restricted stock units		1,560,921		1,408,315		1,374,705		1,549,473
Employee stock purchase plan		17,373		10,231		11,649		10,899
		1,792,889		1,733,191		1,628,631		1,911,967

Goodwill and Intangible Assets, Net

9 Months Ended

Oct. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets, Net

5. Goodwill and Intangible Assets, Net

Goodwill represents the excess of the purchase price over the fair value of net tangible and identifiable intangible assets acquired in a business combination.

Intangible assets primarily consist of software licenses as well as developed technology, customer relationships and trade name that were acquired from business combinations.

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 October 31, 2023, approximately $8.5 million was recorded in accrued and other current liabilities and $9.8 million was recorded in other long-term liabilities in the condensed consolidated balance sheets.

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


	As of October 31, 2023							As of January 31, 2023
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
Software licenses	$	44,340	$	(12,584	)	$	31,756	$	34,128	$	(6,319	)	$	27,809
Developed technology		21,200		(6,204	)		14,996		21,200		(3,932	)		17,268
Customer relationships		13,200		(2,933	)		10,267		13,200		(1,833	)		11,367
Trade name		2,500		(714	)		1,786		2,500		(447	)		2,053
Total intangible assets, net	$	81,240	$	(22,435	)	$	58,805	$	71,028	$	(12,531	)	$	58,497

During the nine months ended October 31, 2023, there were approximately $12.5 million of software licenses purchased and approximately $2.2 million of software licenses retired. The amortization expense associated with software licenses was approximately $3.1 million and $2.0 million for the three months ended October 31, 2023 and 2022, respectively, and was approximately $8.5 million and $5.2 million for the nine months ended October 31, 2023 and 2022, respectively. The amortization expense associated with acquisition-related intangible assets, including developed technology, customer relationships and trade name, was approximately $1.2 million and $1.2 million for the three months ended October 31, 2023 and 2022, respectively, and was approximately $3.6 million and $3.6 million for the nine months ended October 31, 2023 and 2022 respectively. As of October 31, 2023, the Company has not commenced amortization with respect to approximately $9.4 million of software licenses with alternative uses that are to be sold, leased or otherwise marketed as part of products. Once the associated products are available for general release to customers, the Company will commence amortization on a product-by-product basis over the remaining estimated economic life of the products. The expected future amortization expense related to these intangible assets as of October 31, 2023 is as follows:


	As of
	October 31, 2023
Fiscal Year	(in thousands)
2024 (3 months remaining)	$	4,188
2025		14,841
2026		12,479
2027		7,609
2028		6,081
Thereafter		13,607
Total future amortization expenses:	$	58,805

Goodwill and indefinite-lived 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 they may be impaired. There were no goodwill and intangible asset impairments for the three and nine months ended October 31, 2023 and 2022, respectively.

Other Long-Term Liabilities

9 Months Ended

Oct. 31, 2023

Other Liabilities Disclosure [Abstract]

Other Long-Term Liabilities

8. Other Long-Term Liabilities

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Unrecognized tax benefits, including interest	$	3,848	$	3,770
Deferred tax liabilities, non-current		1,018		1,120
Software license liabilities, non-current		9,827		9,614
Other long-term liabilities		3		1,044
Total other long-term liabilities	$	14,696	$	15,548

Accrued and Other Current Liabilities (Tables)

9 Months Ended

Oct. 31, 2023

Payables and Accruals [Abstract]

Schedule of Accrued and Other Current Liabilities

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Accrued employee compensation	$	14,851	$	22,152
Accrued product development costs		27,819		19,433
Software license liabilities, current		8,466		7,059
Other accrued liabilities		6,855		8,011
Total accrued and other current liabilities	$	57,991	$	56,655

Organization and Summary of Significant Accounting Policies (Tables)

9 Months Ended

Oct. 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 condensed consolidated balance sheets, and the totals are presented on the condensed consolidated statements of cash flows:


	As of
	October 31, 2023		January 31, 2023		October 31, 2022		January 31, 2022
	(in thousands)
Cash and cash equivalents	$	143,787	$	113,541	$	112,837	$	171,043
Restricted cash		7		8		7		10
Total as presented in the condensed consolidated statements of cash flows	$	143,794	$	113,549	$	112,844	$	171,053

Accrued and Other Current Liabilities - Additional Information (Detail) $ in Millions	9 Months Ended
	Oct. 31, 2023 USD ($)
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 5.6
Cash [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	1.1
Restricted stock units [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 4.5

Financial Instruments and Fair Value - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2023 USD ($)	Oct. 31, 2022 USD ($)	Oct. 31, 2023 USD ($)	Oct. 31, 2022 USD ($)	Jan. 31, 2023 Security
Investments, Debt and Equity Securities [Abstract]
Number of debt securities with unrealized losses for more than twelve months \| Security					0
Interest income and realized gains and losses from available-for-sale debt securities \| $	$ 1.3	$ 0.7	$ 3.5	$ 0.8

Segment Reporting (Tables)

9 Months Ended

Oct. 31, 2023

Segment Reporting [Abstract]

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


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
	(in thousands)
Taiwan	$	27,179	$	51,306	$	91,295	$	150,595
Asia Pacific		14,300		15,309		45,378		54,724
Europe		2,869		5,310		9,058		18,472
North America other than United States		5,032		8,870		24,407		21,930
United States		1,215		2,301		4,720		8,564
Total revenue	$	50,595	$	83,096	$	174,858	$	254,285

Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Payables and Accruals [Abstract]
Accrued employee compensation	$ 14,851	$ 22,152
Accrued product development costs	27,819	19,433
Software license liabilities, current	8,466	7,059
Other accrued liabilities	6,855	8,011
Total accrued and other current liabilities	$ 57,991	$ 56,655

Financial Instruments and Fair Value (Tables)

9 Months Ended

Oct. 31, 2023

Investments, All Other Investments [Abstract]

Schedule of Available-for-Sale Securities at Fair Value

All of the investments are classified as available-for-sale securities and reported at fair value in the condensed consolidated balance sheets as follows:


	As of October 31, 2023
	Amortized Cost		Unrealized Gains		Unrealized Losses			Fair Value
	(in thousands)
Money market funds	$	1,649	$	—	$	—		$	1,649
Commercial paper		22,963		—		—			22,963
Corporate bonds		40,667		7		(642	)		40,032
Asset-backed securities		17,269		—		(256	)		17,013
U.S. government securities		22,491		—		(328	)		22,163
Total cash equivalents and marketable debt securities	$	105,039	$	7	$	(1,226	)	$	103,820

	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

Schedule of Available-for-Sale Securities Unrealized Loss Position at Fair Value


	As of October 31, 2023
	Less than 12 Months					12 Months or Greater					Total
	Fair Value		Unrealized Losses			Fair Value		Unrealized Losses			Fair Value		Unrealized Losses
	(in thousands)
Corporate bonds	$	29,661	$	(406	)	$	9,098	$	(236	)	$	38,759	$	(642	)
Asset-backed securities		9,550		(87	)		7,463		(169	)		17,013		(256	)
U.S. government securities		14,761		(185	)		7,402		(143	)		22,163		(328	)
Total marketable debt securities at loss position	$	53,972	$	(678	)	$	23,963	$	(548	)	$	77,935	$	(1,226	)

Schedule of Cash Equivalents and Marketable Debt Securities


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Included in cash equivalents	$	25,271	$	7,872
Included in marketable debt securities		78,549		93,322
Total cash equivalents and marketable debt securities	$	103,820	$	101,194

Summary of Contractual Maturities of Investments

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Due within one year	$	39,736	$	48,016
Due in 1 - 5 years		64,084		52,414
Due in 5 - 7 years		—		764
Total cash equivalents and marketable debt securities	$	103,820	$	101,194

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 October 31, 2023 and January 31, 2023, respectively:


	As of October 31, 2023
	Total		Level 1		Level 2		Level 3
	(in thousands)
Money market funds	$	1,649	$	1,649	$	—	$	—
Commercial paper		22,963		—		22,963		—
Corporate bonds		40,032		—		40,032		—
Asset-backed securities		17,013		—		17,013		—
U.S. government securities		22,163		—		22,163		—
Total cash equivalents and marketable debt securities	$	103,820	$	1,649	$	102,171	$	—

	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	$	—

- Definition

Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 9
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-9

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aaa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 11: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

Reference 12: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-3

+ Details

Goodwill and Intangible Assets, Net - Summary of Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 81,240	$ 71,028
Accumulated Amortization	(22,435)	(12,531)
Net Carrying Amount	58,805	58,497
Software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	44,340	34,128
Accumulated Amortization	(12,584)	(6,319)
Net Carrying Amount	31,756	27,809
Developed technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,200	21,200
Accumulated Amortization	(6,204)	(3,932)
Net Carrying Amount	14,996	17,268
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,200	13,200
Accumulated Amortization	(2,933)	(1,833)
Net Carrying Amount	10,267	11,367
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(714)	(447)
Net Carrying Amount	$ 1,786	$ 2,053

Goodwill and Intangible Assets, Net (Tables)

9 Months Ended

Oct. 31, 2023

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of Components of Intangible Assets

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


	As of October 31, 2023							As of January 31, 2023
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
Software licenses	$	44,340	$	(12,584	)	$	31,756	$	34,128	$	(6,319	)	$	27,809
Developed technology		21,200		(6,204	)		14,996		21,200		(3,932	)		17,268
Customer relationships		13,200		(2,933	)		10,267		13,200		(1,833	)		11,367
Trade name		2,500		(714	)		1,786		2,500		(447	)		2,053
Total intangible assets, net	$	81,240	$	(22,435	)	$	58,805	$	71,028	$	(12,531	)	$	58,497

Summary of Expected Future Amortization Expense Related to Intangible Assets

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


	As of
	October 31, 2023
Fiscal Year	(in thousands)
2024 (3 months remaining)	$	4,188
2025		14,841
2026		12,479
2027		7,609
2028		6,081
Thereafter		13,607
Total future amortization expenses:	$	58,805

Stock-based Compensation - Restricted Stock Unit Activities (Detail) - Restricted Stock Unit [Member]	9 Months Ended
	Oct. 31, 2023 $ / shares shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Unvested, beginning balance \| shares	2,573,359
Shares, Granted \| shares	1,190,375
Shares, Vested \| shares	(969,060)
Shares, Forfeited \| shares	(128,201)
Shares, Unvested, ending balance \| shares	2,666,473
Weighted-Average Grant-Date Fair Value, Unvested, beginning balance \| $ / shares	$ 86.81
Weighted-Average Grant-Date Fair Value, Granted \| $ / shares	71.77
Weighted-Average Grant-Date Fair Value, Vested \| $ / shares	78.11
Weighted-Average Grant-Date Fair Value, Forfeited \| $ / shares	76.31
Weighted-Average Grant-Date Fair Value, Unvested, ending balance \| $ / shares	$ 83.76

Capital Stock (Tables)

9 Months Ended

Oct. 31, 2023

Equity [Abstract]

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

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


	As of
	October 31, 2023		January 31, 2023
Shares reserved for options, restricted stock and restricted stock units under equity plans		4,783,996		5,822,819
Shares reserved for employee stock purchase plan		2,834,384		2,986,403

Inventories (Tables)

9 Months Ended

Oct. 31, 2023

Inventory Disclosure [Abstract]

Schedule of Inventory

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Work-in-progress	$	19,016	$	26,023
Finished goods		11,767		14,463
Total	$	30,783	$	40,486

Commitments and Contingencies

9 Months Ended

Oct. 31, 2023

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies

13. 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 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 October 31, 2023 and January 31, 2023, total manufacturing purchase commitments were approximately $26.2 million and $43.6 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 and records the liabilities in accrued and other current liabilities in the condensed consolidated balance sheets. The liabilities for these purchase commitments were immaterial as of October 31, 2023 and were approximately $2.9 million as of January 31, 2023.

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 October 31, 2023, and no liabilities have been recorded for these obligations in the condensed consolidated balance sheets as of October 31, 2023 and January 31, 2023, 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 October 31, 2023 and January 31, 2023, there were no accruals for contingent liabilities related to such matters recorded in the condensed consolidated balance sheets.

Organization and Summary of Significant Accounting Policies (Policies)

9 Months Ended

Oct. 31, 2023

Accounting Policies [Abstract]

Organization

Basis of Presentation

Basis of Consolidation

Concentration of Risk

Restricted Cash


	As of
	October 31, 2023		January 31, 2023		October 31, 2022		January 31, 2022
	(in thousands)
Cash and cash equivalents	$	143,787	$	113,541	$	112,837	$	171,043
Restricted cash		7		8		7		10
Total as presented in the condensed consolidated statements of cash flows	$	143,794	$	113,549	$	112,844	$	171,053

Recent Accounting Pronouncements

None.

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Outstanding Ordinary Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Loss [Member]	Retained Earnings (Accumulated Deficit) [Member]
Beginning Balance, Amount at Jan. 31, 2022	$ 547,176	$ 17	$ 447,287	$ 0	$ 99,872
Beginning Balance, Shares at Jan. 31, 2022		37,302,818
Issuance of shares through employee equity plans, Amount	8,589	$ 0	8,589	0	0
Issuance of shares through employee equity plans, Shares		736,516
Issuance of shares through employee stock purchase plan, Amount	3,250	$ 0	3,250	0	0
Issuance of shares through employee stock purchase plan, Shares		43,545
Stock-based compensation expense	26,155	$ 0	26,155	0	0
Net loss	(10,822)	0	0	0	(10,822)
Ending Balance, Amount at Apr. 30, 2022	574,348	$ 17	485,281	0	89,050
Ending Balance, Shares at Apr. 30, 2022		38,082,879
Beginning Balance, Amount at Jan. 31, 2022	547,176	$ 17	447,287	0	99,872
Beginning Balance, Shares at Jan. 31, 2022		37,302,818
Other comprehensive gain (loss) - net of tax	(1,043)
Net loss	(54,281)
Ending Balance, Amount at Oct. 31, 2022	588,398	$ 17	543,833	(1,043)	45,591
Ending Balance, Shares at Oct. 31, 2022		38,746,179
Beginning Balance, Amount at Apr. 30, 2022	574,348	$ 17	485,281	0	89,050
Beginning Balance, Shares at Apr. 30, 2022		38,082,879
Issuance of shares through employee equity plans, Amount	1,204	$ 0	1,204	0	0
Issuance of shares through employee equity plans, Shares		323,572
Stock-based compensation expense	26,211	$ 0	26,211	0	0
Other comprehensive gain (loss) - net of tax	(2)	0	0	(2)	0
Net loss	(23,650)	0	0	0	(23,650)
Ending Balance, Amount at Jul. 31, 2022	578,111	$ 17	512,696	(2)	65,400
Ending Balance, Shares at Jul. 31, 2022		38,406,451
Issuance of shares through employee equity plans, Amount	386	$ 0	386	0	0
Issuance of shares through employee equity plans, Shares		278,687
Issuance of shares through employee stock purchase plan, Amount	3,386	$ 0	3,386	0	0
Issuance of shares through employee stock purchase plan, Shares		61,041
Stock-based compensation expense	27,365	$ 0	27,365	0	0
Other comprehensive gain (loss) - net of tax	(1,041)	0	0	(1,041)	0
Net loss	(19,809)	0	0		(19,809)
Ending Balance, Amount at Oct. 31, 2022	588,398	$ 17	543,833	(1,043)	45,591
Ending Balance, Shares at Oct. 31, 2022		38,746,179
Beginning Balance, Amount at Jan. 31, 2023	$ 606,088	$ 18	572,076	(492)	34,486
Beginning Balance, Shares at Jan. 31, 2023	39,043,000	39,043,000
Issuance of shares through employee equity plans, Amount	$ 5,198	$ 0	5,198	0	0
Issuance of shares through employee equity plans, Shares		467,996
Issuance of shares through employee stock purchase plan, Amount	4,448	$ 0	4,448	0	0
Issuance of shares through employee stock purchase plan, Shares		80,207
Stock-based compensation expense	26,249	$ 0	26,249	0	0
Other comprehensive gain (loss) - net of tax	110	0	0	110	0
Net loss	(35,902)	0	0	0	(35,902)
Ending Balance, Amount at Apr. 30, 2023	606,191	$ 18	607,971	(382)	(1,416)
Ending Balance, Shares at Apr. 30, 2023		39,591,203
Beginning Balance, Amount at Jan. 31, 2023	$ 606,088	$ 18	572,076	(492)	34,486
Beginning Balance, Shares at Jan. 31, 2023	39,043,000	39,043,000
Other comprehensive gain (loss) - net of tax	$ (727)
Net loss	(108,810)
Ending Balance, Amount at Oct. 31, 2023	$ 591,788	$ 18	667,313	(1,219)	(74,324)
Ending Balance, Shares at Oct. 31, 2023	40,229,267	40,229,267
Beginning Balance, Amount at Apr. 30, 2023	$ 606,191	$ 18	607,971	(382)	(1,416)
Beginning Balance, Shares at Apr. 30, 2023		39,591,203
Issuance of shares through employee equity plans, Amount	553	$ 0	553	0	0
Issuance of shares through employee equity plans, Shares		279,568
Stock-based compensation expense	27,320	$ 0	27,320	0	0
Other comprehensive gain (loss) - net of tax	(548)	0	0	(548)	0
Net loss	(31,198)	0	0	0	(31,198)
Ending Balance, Amount at Jul. 31, 2023	602,318	$ 18	635,844	(930)	(32,614)
Ending Balance, Shares at Jul. 31, 2023		39,870,771
Issuance of shares through employee equity plans, Amount	334	$ 0	334	0	0
Issuance of shares through employee equity plans, Shares		286,684
Issuance of shares through employee stock purchase plan, Amount	3,486	$ 0	3,486	0	0
Issuance of shares through employee stock purchase plan, Shares		71,812
Stock-based compensation expense	27,649	$ 0	27,649	0	0
Other comprehensive gain (loss) - net of tax	(289)	0	0	(289)	0
Net loss	(41,710)	0	0	0	(41,710)
Ending Balance, Amount at Oct. 31, 2023	$ 591,788	$ 18	$ 667,313	$ (1,219)	$ (74,324)
Ending Balance, Shares at Oct. 31, 2023	40,229,267	40,229,267

- Definition

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

+ References

+ Details

- Definition

Amount of equity (deficit) attributable to parent. Excludes temporary equity and equity attributable to noncontrolling interest.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481372/852-10-55-10

Reference 2: http://www.xbrl.org/2003/role/exampleRef
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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Reference 8: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 9: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 10: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 825
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-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-28

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Reference 14: http://fasb.org/us-gaap/role/ref/legacyRef
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-2

+ Details

Segment Reporting - Additional Information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023 USD ($)	Oct. 31, 2022	Oct. 31, 2023 USD ($) Segment	Oct. 31, 2022	Jan. 31, 2023 USD ($)
Concentration Risk [Line Items]
Number of reportable segment \| Segment			1
Property and equipment, net	$ 10,917		$ 10,917		$ 11,814
Accounts receivable	$ 22,968		$ 22,968		51,987
Sales revenue, net [Member] \| WT [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	53.70%	61.60%	52.20%	59.10%
Sales revenue, net [Member] \| Hakuto [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	12.00%
Sales revenue, net [Member] \| Chicony [Member] \| Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	11.70%	10.70%	13.90%	11.60%
Accounts receivable [Member] \| WT [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 8,100		$ 8,100
Accounts receivable [Member] \| Hakuto [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	1,100		1,100
Accounts receivable [Member] \| Chicony [Member] \| Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	6,000		6,000
Asia Pacific [Member]
Concentration Risk [Line Items]
Property and equipment, net	5,700		5,700		6,300
United States [Member]
Concentration Risk [Line Items]
Property and equipment, net	3,900		3,900		4,000
Europe [Member]
Concentration Risk [Line Items]
Property and equipment, net	$ 1,300		$ 1,300		$ 1,500

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Oct. 31, 2023	Jan. 31, 2023
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	40,229,267	39,043,000
Ordinary shares, shares outstanding	40,229,267	39,043,000

Stock-based Compensation

9 Months Ended

Oct. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock-based Compensation

10. Stock-based Compensation

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


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
	(in thousands)
Stock-based compensation:
Cost of revenue	$	868	$	360	$	2,694	$	1,071
Research and development		17,898		18,741		54,809		53,775
Selling, general and administrative		8,643		9,000		25,293		27,205
Total stock-based compensation	$	27,409	$	28,101	$	82,796	$	82,051

As of October 31, 2023, approximately $1.4 million of stock-based compensation expense was accrued in accrued and other current liabilities in the condensed consolidated balance sheets. Total unrecognized compensation cost related to unvested stock options at October 31, 2023 was $8.3 million and is expected to be recognized over a weighted-average period of 1.45 years. Total unrecognized compensation cost related to unvested restricted stock units at October 31, 2023 was approximately $188.0 million and is expected to be recognized over a weighted-average period of 2.56 years.

On October 17, 2023, the Company entered into a separation agreement and release with Mr. Brian White, the Company’s Chief Financial Officer, associated with his retirement for his continued service through January 31, 2024 ("the separation date"). The agreement provides for acceleration of vesting of 24,559 shares of equity awards and compensation of $693,000 which is expected to be settled through the issuance of restricted stock units. As a result, the Company expects to recognize approximately $1.9 million of additional stock-based compensation expense through the separation date, of which $0.2 million has been recognized in the three months ended October 31, 2023.

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
Employee stock purchase plan awards:
Volatility		54	%		72	%		56	%		81	%
Risk-free interest rate		5.49	%		3.78	%		5.11	%		2.32	%
Expected term (years)		0.5			0.5		0.5			0.5
Dividend yield		0	%		0	%		0	%		0	%

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


	Option Outstanding
									Weighted-
							Total Intrinsic		Average
						Weighted-	Value Of		Remaining		Aggregate
				Weighted-		Average	Options		Contractual		Intrinsic
				Average		Grant-date	Exercised		Term		Value
	Shares			Exercise Price		Fair Value	(in thousands)		(in years)		(in thousands)
Outstanding at January 31, 2023		484,791		$	42.18
Exercised		(65,188	)		23.62		$	3,418
Forfeited		(926	)		42.59
Expired		(1,064	)		74.33
Outstanding at October 31, 2023		417,613			45.00					3.68	$	2,584
Exercisable at October 31, 2023		358,750		$	46.30					3.15	$	1,790

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 ordinary shares on October 31, 2023 was $44.99, as reported by The Nasdaq Global Select Market. The intrinsic value of exercised options is calculated based on the difference between the fair market value of the Company’s ordinary shares on the exercise date and the exercise price.

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


				Weighted-
				Average
				Grant-Date
	Shares			Fair Value
Unvested at January 31, 2023		2,573,359		$	86.81
Granted		1,190,375			71.77
Vested		(969,060	)		78.11
Forfeited		(128,201	)		76.31
Unvested at October 31, 2023		2,666,473		$	83.76

As of October 31, 2023, the aggregate intrinsic value of unvested restricted stock units was $120.0 million.

Accrued and Other Current Liabilities

9 Months Ended

Oct. 31, 2023

Payables and Accruals [Abstract]

Accrued and Other Current Liabilities

6. Accrued and Other Current Liabilities

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Accrued employee compensation	$	14,851	$	22,152
Accrued product development costs		27,819		19,433
Software license liabilities, current		8,466		7,059
Other accrued liabilities		6,855		8,011
Total accrued and other current liabilities	$	57,991	$	56,655

The timing of SoC development and invoicing from outside foundries usually results in the fluctuation of accrued product development costs. For the accrued employee compensation, approximately $5.6 million of annual bonus was paid in the first quarter of fiscal year 2024, of which $1.1 million was paid in cash and $4.5 million was settled with restricted stock units.

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Current assets:
Cash and cash equivalents	$ 143,787	$ 113,541
Marketable debt securities	78,549	93,322
Accounts receivable, net	22,968	51,987
Inventories	30,783	40,486
Restricted cash	7	8
Prepaid expenses and other current assets	3,728	5,288
Total current assets	279,822	304,632
Property and equipment, net	10,917	11,814
Deferred tax assets, non-current	22,952	19,276
Intangible assets, net	58,805	58,497
Operating lease right-of-use assets, net	5,760	8,339
Goodwill	303,625	303,625
Other non-current assets	2,748	4,012
Total assets	684,629	710,195
Current liabilities:
Accounts payable	9,298	17,845
Accrued and other current liabilities	57,991	56,655
Operating lease liabilities, current	3,553	3,539
Income taxes payable	2,391	4,112
Deferred revenue, current	2,596	1,311
Total current liabilities	75,829	83,462
Operating lease liabilities, non-current	2,316	5,097
Other long-term liabilities	14,696	15,548
Total liabilities	92,841	104,107
Commitments and contingencies (Note 13)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at October 31, 2023 and January 31, 2023, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized; 40,229,267 and 39,043,000 shares issued and outstanding at October 31, 2023 and January 31, 2023, respectively	18	18
Additional paid-in capital	667,313	572,076
Accumulated other comprehensive loss	(1,219)	(492)
Retained earnings (accumulated deficit)	(74,324)	34,486
Total shareholders’ equity	591,788	606,088
Total liabilities and shareholders' equity	$ 684,629	$ 710,195

Goodwill and Intangible Assets, Net - Summary of Expected Future Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
2024 (3 months remaining)	$ 4,188
2025	14,841
2026	12,479
2027	7,609
2028	6,081
Thereafter	13,607
Net Carrying Amount	$ 58,805	$ 58,497

Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Other Liabilities Disclosure [Abstract]
Unrecognized tax benefits, including interest	$ 3,848	$ 3,770
Deferred tax liabilities, non-current	1,018	1,120
Software license liabilities, non-current	9,827	9,614
Other long-term liabilities	3	1,044
Total other long-term liabilities	$ 14,696	$ 15,548

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Property, Plant and Equipment [Abstract]
Depreciation of property and equipment	$ 1.2	$ 1.0	$ 3.5	$ 2.8

Inventories

9 Months Ended

Oct. 31, 2023

Inventory Disclosure [Abstract]

Inventories

3. Inventories

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


	As of
	October 31, 2023		January 31, 2023
	(in thousands)
Work-in-progress	$	19,016	$	26,023
Finished goods		11,767		14,463
Total	$	30,783	$	40,486

Insider Trading Arrangements	9 Months Ended
Insider Trading Arrangements	Oct. 31, 2023
Trading Arrangements, by Individual
Material Terms of Trading Arrangement	Securities Trading Plans of Directors and Executive Officers During our last fiscal quarter ending October 31, 2023, no director or officer, as defined in Rule 16a-1(f), adopted or terminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” each as defined in Regulation S-K Item 408.
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Income Taxes

9 Months Ended

Oct. 31, 2023

Income Tax Disclosure [Abstract]

Income Taxes

12. Income Taxes

The following table provides details of income taxes for the periods indicated:


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
	(in thousands)
Loss before income taxes	$	(40,065	)	$	(18,697	)	$	(108,923	)	$	(49,323	)
Provision (benefit) for income taxes		1,645			1,112			(113	)		4,958
Effective tax rate	(4.1)%			(6.0)%			0.1%			(10.1)%

The Company recorded an expense for income taxes of $1.6 million for the three months ended October 31, 2023 and a benefit for income taxes of $0.1 million for the nine months ended October 31, 2023, respectively. For the three and nine months ended October 31, 2022, the Company recorded an expense for income taxes of $1.1 million and $5.0 million, respectively. The increase in income tax expense for the three months ended October 31, 2023, as compared to the same period in the prior fiscal year, was primarily due to an increase in non-deductible stock-based compensation. The decrease in income tax expense for the nine months ended October 31, 2023 was primarily due to the tax benefit from the release of a $4.0 million valuation allowance on the deferred tax assets of Oculii Corp, or Oculii, partially offset by an increase in the proportion of profits generated in higher tax jurisdictions.

The Company periodically evaluates the realizability of its net deferred tax assets based on all available evidence, using a “more likely than not” standard. The realizability of the Company’s net deferred tax assets is dependent on its ability to generate sufficient future taxable income during periods prior to the expiration of tax attributes to fully utilize these assets. During the second quarter of fiscal year 2024, based on all available positive and negative evidence, the Company determined it was appropriate to release the valuation allowance on Oculii’s US federal deferred tax assets. The Company recognized a $3.6 million tax benefit in the first half of fiscal year 2024 as a result of the valuation allowance release. The Company recognized an additional $0.4 million tax benefit during the three months ended October 31, 2023.

The Company files federal and state income tax returns in the United States and in various foreign jurisdictions. The Company’s fiscal years 2020 through 2023 are generally open and subject to potential examination by U.S. federal tax authorities. The Company’s fiscal years 2019 through 2023 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. As of October 31, 2023, the gross amount of unrecognized tax benefits was approximately $22.6 million. 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.

- 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
-Topic 946
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480990/946-20-50-13

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 235
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-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(h)(2))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480678/235-10-S99-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 740
-Name Accounting Standards Codification
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-URI https://asc.fasb.org//740/tableOfContent

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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-URI https://asc.fasb.org//1943274/2147482685/740-10-50-14

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147482685/740-10-50-21

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
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-Paragraph 1
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-URI https://asc.fasb.org//1943274/2147482526/740-270-50-1

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147482685/740-10-50-17

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
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Reference 9: http://www.xbrl.org/2003/role/disclosureRef
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Reference 10: http://www.xbrl.org/2003/role/disclosureRef
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-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482603/740-30-50-2

+ Details

Property and Equipment, Net - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 36,226	$ 34,177
Less: accumulated depreciation and amortization	(25,309)	(22,363)
Total property and equipment, net	10,917	11,814
Computer hardware and software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	22,869	20,733
Tools and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	8,174	8,325
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,347	1,311
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,414	3,295
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 422	$ 513

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022
Cash flows from operating activities:
Net loss	$ (108,810)	$ (54,281)
Adjustments to reconcile net loss to net cash provided by operating activities:
Depreciation and amortization	18,402	14,426
Amortization (accretion) of premium (discount) on marketable debt securities, net	(957)	(281)
Stock-based compensation	82,796	82,051
Deferred income taxes	(3,676)	755
Other non-cash items, net	1,066	28
Changes in operating assets and liabilities:
Accounts receivable	29,019	(4,249)
Inventories	9,703	(176)
Prepaid expenses and other current assets	1,539	80
Other non-current assets	105	841
Accounts payable	(8,553)	(2,044)
Accrued and other current liabilities	6,938	2,813
Income taxes payable	(1,721)	2,537
Deferred revenue	171	(378)
Operating lease liabilities	(2,940)	(3,254)
Other long-term liabilities	(26)	135
Net cash provided by operating activities	23,056	39,003
Cash flows from investing activities:
Purchase of investments	(34,433)	(87,641)
Sales of investments	5,222	756
Maturities of investments	44,310	0
Purchase of tangible and intangible assets	(10,047)	(13,023)
Escrow claim associated with business acquisition	0	749
Net cash provided by (used in) investing activities	5,052	(99,159)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	6,912	6,834
Payment for intangible assets	(4,775)	(4,887)
Net cash provided by financing activities	2,137	1,947
Net increase (decrease) in cash, cash equivalents and restricted cash	30,245	(58,209)
Cash, cash equivalents and restricted cash at beginning of period	113,549	171,053
Cash, cash equivalents and restricted cash at end of period	143,794	112,844
Supplemental disclosure of cash flow information:
Cash paid for income taxes	5,499	1,340
Supplemental disclosure of noncash investing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 6,868	$ 1,239

Leases (Tables)

9 Months Ended

Oct. 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:


	Three Months Ended		Nine Months Ended
	October 31, 2023		October 31, 2023
	(in thousands)
Cash paid for operating leases included in operating cash flows	$	947	$	2,940
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets		51		171

Schedule of Future Minimum Lease Payments for Lease Liabilities


	As of
	October 31, 2023
Fiscal Year	(in thousands)
2024 (3 months remaining)	$	936
2025		3,353
2026		1,364
2027		289
2028		100
Thereafter		—
Total future annual minimum lease payments		6,042
Less: interest		(173	)
Total lease liabilities	$	5,869

Stock-based Compensation - Weighted-Average Assumptions Used to Estimate Fair Value (Detail) - Employee stock purchase plan awards [Member]	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility	54.00%	72.00%	56.00%	81.00%
Risk-free interest rate	5.49%	3.78%	5.11%	2.32%
Expected term (years)	6 months	6 months	6 months	6 months
Dividend yield	0.00%	0.00%	0.00%	0.00%

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
-SubTopic 10
-Name Accounting Standards Codification
-Section 35
-Paragraph 1D
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480483/718-10-35-1D

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Section 35
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-URI https://asc.fasb.org//1943274/2147480483/718-10-35-3

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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-Name Accounting Standards Codification
-Section 50
-Paragraph 2
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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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Reference 5: http://www.xbrl.org/2003/role/disclosureRef
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-URI https://asc.fasb.org//1943274/2147480429/718-10-50-2

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 718
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Reference 7: http://www.xbrl.org/2003/role/disclosureRef
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+ Details

Capital Stock - Schedule of Ordinary Shares Reserved for Future Issuance under Company's Equity Plans and Employee Stock Purchase Plan (Detail) - shares	Oct. 31, 2023	Jan. 31, 2023
Equity Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	4,783,996	5,822,819
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	2,834,384	2,986,403

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

+ Details

Net Loss Per Ordinary Share

9 Months Ended

Oct. 31, 2023

Earnings Per Share [Abstract]

Net Loss Per Ordinary Share

11. Net Loss Per Ordinary Share

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
	(in thousands, except share and per share data)
Numerator:
Net loss	$	(41,710	)	$	(19,809	)	$	(108,810	)	$	(54,281	)
Denominator:
Weighted-average ordinary shares - basic		40,053,251			38,582,584			39,710,248			38,185,421
Weighted-average ordinary shares - diluted		40,053,251			38,582,584			39,710,248			38,185,421
Net loss per ordinary share:
Basic	$	(1.04	)	$	(0.51	)	$	(2.74	)	$	(1.42	)
Diluted	$	(1.04	)	$	(0.51	)	$	(2.74	)	$	(1.42	)

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:


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
Options to purchase ordinary shares		214,595		314,645		242,277		351,595
Restricted stock units		1,560,921		1,408,315		1,374,705		1,549,473
Employee stock purchase plan		17,373		10,231		11,649		10,899
		1,792,889		1,733,191		1,628,631		1,911,967

Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Oct. 31, 2023	Jan. 31, 2023
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 Repurchase Program [Member]
Class Of Stock [Line Items]
Stock repurchased, shares	0
Amount available under stock repurchase program	$ 49.0

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Reference 14: http://www.xbrl.org/2003/role/disclosureRef
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-Publisher FASB
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+ Details

- Definition

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

+ References + Details

Organization and Summary of Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023	Oct. 31, 2022	Jan. 31, 2022
Cash and Cash Equivalents [Abstract]
Cash and cash equivalents	$ 143,787	$ 113,541	$ 112,837	$ 171,043
Restricted cash	7	8	7	10
Total as presented in the condensed consolidated statements of cash flows	$ 143,794	$ 113,549	$ 112,844	$ 171,053

Stock-based Compensation - Stock Option Activities (Detail) $ / shares in Units, $ in Thousands	9 Months Ended
	Oct. 31, 2023 USD ($) $ / shares shares
Share-Based Payment Arrangement [Abstract]
Shares, Outstanding \| shares	484,791
Shares, Exercised \| shares	(65,188)
Shares, Forfeited \| shares	(926)
Shares, Expired \| shares	(1,064)
Shares, Outstanding \| shares	417,613
Shares, Exercisable \| shares	358,750
Weighted-Average Exercise Price, Outstanding \| $ / shares	$ 42.18
Weighted-Average Exercise Price, Exercised \| $ / shares	23.62
Weighted-Average Exercise Price, Forfeited \| $ / shares	42.59
Weighted-Average Exercise Price, Expired \| $ / shares	74.33
Weighted-Average Exercise Price, Outstanding \| $ / shares	45
Weighted-Average Exercise Price, Exercisable \| $ / shares	$ 46.3
Total Intrinsic Value Of Options Exercised \| $	$ 3,418
Weighted-Average Remaining Contractual Term, Outstanding	3 years 8 months 4 days
Weighted-Average Remaining Contractual Term, Exercisable	3 years 1 month 24 days
Aggregate Intrinsic Value, Outstanding \| $	$ 2,584
Aggregate Intrinsic Value, Exercisable \| $	$ 1,790

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
	Jul. 31, 2023	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Income Taxes [Line Items]
Income tax (benefit) expense		$ 1,645	$ 1,112	$ (113)	$ 4,958
Unrecognized tax benefits		22,600		$ 22,600
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
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
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
Oculii Corp [Member]
Income Taxes [Line Items]
Valuation allowance	$ 3,600	$ 400		$ 4,000

Income Taxes (Tables)

9 Months Ended

Oct. 31, 2023

Income Tax Disclosure [Abstract]

Summary of Income Taxes

The following table provides details of income taxes for the periods indicated:


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
	(in thousands)
Loss before income taxes	$	(40,065	)	$	(18,697	)	$	(108,923	)	$	(49,323	)
Provision (benefit) for income taxes		1,645			1,112			(113	)		4,958
Effective tax rate	(4.1)%			(6.0)%			0.1%			(10.1)%

Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Revenue from External Customer [Line Items]
Total revenue	$ 50,595	$ 83,096	$ 174,858	$ 254,285
Taiwan [Member]
Revenue from External Customer [Line Items]
Total revenue	27,179	51,306	91,295	150,595
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	14,300	15,309	45,378	54,724
Europe [Member]
Revenue from External Customer [Line Items]
Total revenue	2,869	5,310	9,058	18,472
North America other than United States [Member]
Revenue from External Customer [Line Items]
Total revenue	5,032	8,870	24,407	21,930
United States [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 1,215	$ 2,301	$ 4,720	$ 8,564

- 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
-Topic 924
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479941/924-10-S99-1

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 30
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-30

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 42
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-42

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-40

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 22
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-22

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 32
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-32

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482810/280-10-50-41

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-4

+ Details

Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 31, 2023	Oct. 31, 2022	Oct. 31, 2023	Oct. 31, 2022
Lessee Lease Description [Line Items]
Operating lease expense	$ 1.0	$ 1.0	$ 2.8	$ 2.8
Weighted-average remaining lease term - operating leases	1 year 11 months 12 days		1 year 11 months 12 days
Weighted-average discount rate - operating leases	3.62%		3.62%

Stock-based Compensation (Tables)

9 Months Ended

Oct. 31, 2023

Share-Based Payment Arrangement [Abstract]

Classification of Stock-based Compensation

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


	Three Months Ended October 31,				Nine Months Ended October 31,
	2023		2022		2023		2022
	(in thousands)
Stock-based compensation:
Cost of revenue	$	868	$	360	$	2,694	$	1,071
Research and development		17,898		18,741		54,809		53,775
Selling, general and administrative		8,643		9,000		25,293		27,205
Total stock-based compensation	$	27,409	$	28,101	$	82,796	$	82,051

Weighted-Average Assumptions Used to Estimate Fair Value

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


	Three Months Ended October 31,						Nine Months Ended October 31,
	2023			2022			2023			2022
Employee stock purchase plan awards:
Volatility		54	%		72	%		56	%		81	%
Risk-free interest rate		5.49	%		3.78	%		5.11	%		2.32	%
Expected term (years)		0.5			0.5		0.5			0.5
Dividend yield		0	%		0	%		0	%		0	%

Stock Option Activities

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


	Option Outstanding
									Weighted-
							Total Intrinsic		Average
						Weighted-	Value Of		Remaining		Aggregate
				Weighted-		Average	Options		Contractual		Intrinsic
				Average		Grant-date	Exercised		Term		Value
	Shares			Exercise Price		Fair Value	(in thousands)		(in years)		(in thousands)
Outstanding at January 31, 2023		484,791		$	42.18
Exercised		(65,188	)		23.62		$	3,418
Forfeited		(926	)		42.59
Expired		(1,064	)		74.33
Outstanding at October 31, 2023		417,613			45.00					3.68	$	2,584
Exercisable at October 31, 2023		358,750		$	46.30					3.15	$	1,790

Restricted Stock Unit Activities

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


				Weighted-
				Average
				Grant-Date
	Shares			Fair Value
Unvested at January 31, 2023		2,573,359		$	86.81
Granted		1,190,375			71.77
Vested		(969,060	)		78.11
Forfeited		(128,201	)		76.31
Unvested at October 31, 2023		2,666,473		$	83.76

Inventories - Schedule of Inventory (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Inventory Disclosure [Abstract]
Work-in-progress	$ 19,016	$ 26,023
Finished goods	11,767	14,463
Total	$ 30,783	$ 40,486

Financial Instruments and Fair Value - Schedule of Fair Value of Financial Instruments Measured on Recurring Basis (Detail) - USD ($) $ in Thousands	Oct. 31, 2023	Jan. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	$ 103,820	$ 101,194
Money market funds [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	1,649	7,872
Commercial paper [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	22,963	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	40,032	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	17,013	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	22,163	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	1,649	7,872
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	1,649	7,872
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	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	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	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	0
Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total cash equivalents and marketable debt securities	102,171	93,322
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	22,963	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	40,032	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	17,013	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	22,163	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	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	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	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	$ 0