Ambarella (AMBA) 10-Q 8 Jun 22 2023 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Apr. 30, 2022	Jun. 01, 2022
Cover [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Apr. 30, 2022
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
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		38,120,104
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

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Current assets:
Cash and cash equivalents	$ 200,639	$ 171,043
Accounts receivable, net	28,008	44,307
Inventories	41,523	45,219
Restricted cash	10	10
Prepaid expenses and other current assets	8,149	6,169
Total current assets	278,329	266,748
Property and equipment, net	10,138	10,134
Deferred tax assets, non-current	13,970	15,340
Intangible assets, net	48,477	46,302
Operating lease right-of-use assets, net	10,292	11,127
Goodwill	303,625	303,625
Other non-current assets	3,834	4,269
Total assets	668,665	657,545
Current liabilities:
Accounts payable	29,763	31,170
Accrued and other current liabilities	39,354	52,064
Operating lease liabilities, current	3,293	3,391
Income taxes payable	1,481	1,245
Deferred revenue, current	964	1,414
Total current liabilities	74,855	89,284
Operating lease liabilities, non-current	7,438	8,322
Other long-term liabilities	12,024	12,763
Total liabilities	94,317	110,369
Commitments and contingencies (Note 12)	0	0
Shareholders' equity:
Preference shares, $0.00045 par value per share, 20,000,000 shares authorized and no shares issued and outstanding at April 30, 2022 and January 31, 2022, respectively	0	0
Ordinary shares, $0.00045 par value per share, 200,000,000 shares authorized at April 30, 2022 and January 31, 2022, respectively; 38,082,879 shares issued and outstanding at April 30, 2022; 37,302,818 shares issued and outstanding at January 31, 2022	17	17
Additional paid-in capital	485,281	447,287
Retained earnings	89,050	99,872
Total shareholders’ equity	574,348	547,176
Total liabilities and shareholders' equity	$ 668,665	$ 657,545

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares	Apr. 30, 2022	Jan. 31, 2022
Statement Of Financial Position [Abstract]
Preference shares, par value	$ 0.00045	$ 0.00045
Preference shares, shares authorized	20,000,000	20,000,000
Preference shares, shares issued	0	0
Preference shares, shares outstanding	0	0
Ordinary shares, par value	$ 0.00045	$ 0.00045
Ordinary shares, shares authorized	200,000,000	200,000,000
Ordinary shares, shares issued	38,082,879	37,302,818
Ordinary shares, shares outstanding	38,082,879	37,302,818

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Income Statement [Abstract]
Revenue	$ 90,305	$ 70,133
Cost of revenue	33,758	26,368
Gross profit	56,547	43,765
Operating expenses:
Research and development	46,690	37,874
Selling, general and administrative	20,355	16,027
Total operating expenses	67,045	53,901
Loss from operations	(10,498)	(10,136)
Other income, net	86	593
Loss before income taxes	(10,412)	(9,543)
Provision for income taxes	410	1,275
Net loss	$ (10,822)	$ (10,818)
Net loss per share attributable to ordinary shareholders:
Basic	$ (0.29)	$ (0.30)
Diluted	$ (0.29)	$ (0.30)
Weighted-average shares used to compute net loss per share attributable to ordinary shareholders:
Basic	37,715,338	35,940,304
Diluted	37,715,338	35,940,304

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Loss (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net loss	$ (10,822)	$ (10,818)
Other comprehensive loss, net of tax:
Net unrealized losses on investments	0	(427)
Other comprehensive loss, net of tax	0	(427)
Comprehensive loss	$ (10,822)	$ (11,245)

Condensed Consolidated Statem_3

Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Outstanding Ordinary Shares [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]
Beginning Balance, Amount at Jan. 31, 2021	$ 474,976	$ 16	$ 347,458	$ 1,219	$ 126,283
Beginning Balance, Shares at Jan. 31, 2021		35,547,440
Issuance of shares through employee equity plans, Amount	6,741	$ 0	6,741	0	0
Issuance of shares through employee equity plans, Shares		643,120
Issuance of shares through employee stock purchase plan, Amount	3,694	$ 0	3,694	0	0
Issuance of shares through employee stock purchase plan, Shares		82,783
Stock-based compensation expense	17,128	$ 0	17,128	0	0
Net unrealized losses on investments - net of tax	(427)	0	0	(427)	0
Net loss	(10,818)	0	0	0	(10,818)
Ending Balance, Amount at Apr. 30, 2021	491,294	$ 16	375,021	792	115,465
Ending Balance, Shares at Apr. 30, 2021		36,273,343
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	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 unrealized losses on investments - net of tax	0	0	0	0	0
Net loss	(10,822)	0	0	$ 0	(10,822)
Ending Balance, Amount at Apr. 30, 2022	$ 574,348	$ 17	$ 485,281		$ 89,050
Ending Balance, Shares at Apr. 30, 2022	38,082,879	38,082,879

Condensed Consolidated Statem_4

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Cash flows from operating activities:
Net loss	$ (10,822)	$ (10,818)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	4,608	2,883
Amortization (accretion) of premium (discount) on marketable debt securities, net	0	417
Stock-based compensation	27,041	18,842
Deferred income taxes	1,370	433
Other non-cash items, net	32	(190)
Changes in operating assets and liabilities:
Accounts receivable	16,299	(9,554)
Inventories	3,696	(7,039)
Prepaid expenses and other current assets	(2,731)	161
Other non-current assets	435	(65)
Accounts payable	(2,865)	(480)
Accrued and other current liabilities	(2,515)	1,969
Income taxes payable	236	(262)
Deferred revenue	(450)	(74)
Operating lease liabilities	(1,069)	(856)
Other long-term liabilities	295	86
Net cash provided by (used in) operating activities	33,560	(4,547)
Cash flows from investing activities:
Purchase of investments	0	(57,117)
Escrow claim associated with business acquisition	749	0
Sales of investments	0	18,609
Maturities of investments	0	29,232
Purchase of tangible and intangible assets	(4,701)	(1,954)
Net cash used in investing activities	(3,952)	(11,230)
Cash flows from financing activities:
Proceeds from exercise of stock options and employee stock purchase plan	1,876	3,893
Payment for intangible assets	(1,888)	(1,881)
Net cash provided by (used in) financing activities	(12)	2,012
Net increase (decrease) in cash, cash equivalents and restricted cash	29,596	(13,765)
Cash, cash equivalents and restricted cash at beginning of period	171,053	241,284
Cash, cash equivalents and restricted cash at end of period	200,649	227,519
Supplemental disclosure of cash flow information:
Cash paid for income taxes	232	1,013
Supplemental disclosure of noncash investing and financing activities:
Unpaid liabilities related to tangible and intangible assets purchases	$ 1,549	$ 304

Organization and Summary of Sig

Organization and Summary of Significant Accounting Policies	3 Months Ended
	Apr. 30, 2022
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 design manufacturers, or ODMs, and original equipment manufacturers, or 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 2022 fiscal year filed with the SEC on April 1, 2022 (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, 2022. 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 in Asia other than Japan, and Hakuto Co., Ltd., or Hakuto, a Japan distributor, and directly to one ODM customer, Chicony Electronics Co., Ltd., or Chicony. Termination of the relationships with these customers could result in a temporary or permanent loss of revenue. Furthermore, any credit issues from these customers could impair their abilities to make timely payment to the Company. See Note 13 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. The cash equivalents consist primarily of money market funds which management assesses to be highly liquid. In fiscal year 2022, the Company fully liquidated its investments in debt securities to finance the acquisition of Oculii Corp, or Oculii. As of April 30, 2022 and January 31, 2022, there were no debt security investments recorded in the condensed consolidated balance sheets. 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 April 30, 2022 and January 31, 2022, 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 April 30, 2022 January 31, 2022 April 30, 2021 January 31, 2021 (in thousands) Cash and cash equivalents $ 200,639 $ 171,043 $ 227,509 $ 241,274 Restricted cash 10 10 10 10 Total as presented in the condensed consolidated statements of cash flows $ 200,649 $ 171,053 $ 227,519 $ 241,284 Recent Accounting Pronouncements None.

Inventories

Inventories	3 Months Ended
	Apr. 30, 2022
Inventory Disclosure [Abstract]
Inventories	2. Inventories Inventories at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Work-in-progress $ 32,892 $ 25,844 Finished goods 8,631 19,375 Total $ 41,523 $ 45,219

Property and Equipment, Net

Property and Equipment, Net	3 Months Ended
	Apr. 30, 2022
Property Plant And Equipment [Abstract]
Property and Equipment, Net	3. Property and Equipment, Net Depreciation expense was approximately $0.9 million and $0.6 million for the three months ended April 30, 2022 and 2021, respectively. Property and equipment at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Computer equipment and software $ 17,133 $ 16,488 Machinery and equipment 7,757 7,532 Furniture and fixtures 1,253 1,243 Leasehold improvements 3,065 2,942 Construction in progress 806 1,060 30,014 29,265 Less: accumulated depreciation and amortization (19,876 ) (19,131 ) Total property and equipment, net $ 10,138 $ 10,134

Intangible Assets, Net

Intangible Assets, Net	3 Months Ended
	Apr. 30, 2022
Goodwill And Intangible Assets Disclosure [Abstract]
Intangible Assets, Net	4. Intangible Assets, Net As of April 30, 2022, the 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 April 30, 2022, $4.9 million was recorded in accrued and other current liabilities and $0.6 million was recorded in other long-term liabilities in the condensed consolidated balance sheets. The components of intangible assets as of April 30, 2022 and January 31, 2022 were as follows : As of April 30, 2022 As of January 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount (in thousands) Software licenses $ 26,635 $ (12,486 ) $ 14,149 $ 22,093 $ (11,331 ) $ 10,762 Developed technology 21,200 (1,661 ) 19,539 21,200 (904 ) 20,296 Customer relationships 13,200 (733 ) 12,467 13,200 (367 ) 12,833 Trade name 2,500 (178 ) 2,322 2,500 (89 ) 2,411 Total intangible assets, net $ 63,535 $ (15,058 ) $ 48,477 $ 58,993 $ (12,691 ) $ 46,302 During the three months ended April 30, 2022, there was approximately $4.9 million of software licenses purchased and approximately $0.4 million of software licenses retired. The amortization expense associated with software licenses was approximately $1.6 million and $1.5 million for the three months ended April 30, 2022 and 2021, respectively. The amortization expense associated with acquisition-related intangible assets, including developed technology, customer relationships and trade name, was approximately $1.2 million for the three months ended April 30, 2022. There was no acquisition-related amortization expense for the three months ended April 30, 2021. The expected future amortization expense related to these intangible assets as of April 30, 2022 is as follows: As of April 30, 2022 Fiscal Year (in thousands) 2023 (9 months remaining) $ 7,693 2024 8,211 2025 6,971 2026 5,408 2027 5,405 Thereafter 14,789 Total future amortization expenses: $ 48,477 The intangible assets are required to be tested for impairment at least annually in the fourth fiscal quarter or sooner whenever events or changes in circumstances indicate that the assets may be impaired. There were no intangible asset impairments for the three months ended April 30, 2022 and 2021, respectively.

Accrued and Other Current Liabi

Accrued and Other Current Liabilities	3 Months Ended
	Apr. 30, 2022
Payables And Accruals [Abstract]
Accrued and Other Current Liabilities	5. Accrued and Other Current Liabilities Accrued and other current liabilities at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Accrued employee compensation $ 20,751 $ 30,044 Accrued product development costs 6,992 10,523 Software license liabilities, current 4,947 6,001 Other accrued liabilities 6,664 5,496 Total accrued and other current liabilities $ 39,354 $ 52,064 The timing of SoC development progress and payments to outside foundries resulted in fluctuation of the accrued product development costs. The decrease in employee compensation liabilities was primarily due to $10.9 million of annual bonus paid in the first quarter of fiscal year 2023, of which $3.2 million was paid in cash and $7.7 million was settled with restricted stock units.

Leases

Leases	3 Months Ended
	Apr. 30, 2022
Leases [Abstract]
Leases	6. Leases The Company has entered into various operating leases for its worldwide office facilities . . Supplemental cash flow information related to leases is as follows: Three Months Ended April 30, 2022 (in thousands) Cash paid for operating leases included in operating cash flows $ 1,069 Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets $ 87 As of April 30, 2022, the weighted average remaining lease term is 3.39 years, and the weighted average discount rate is 3.56 percent. Future minimum lease payments for the lease liabilities are as follows : As of April 30, 2022 Fiscal Year (in thousands) 2023 (9 months remaining) $ 2,737 2024 3,443 2025 3,240 2026 1,421 2027 344 Thereafter 123 Total future annual minimum lease payments 11,308 Less: interest (577 ) Total lease liabilities $ 10,731

Other Long-Term Liabilities

Other Long-Term Liabilities	3 Months Ended
	Apr. 30, 2022
Other Liabilities Disclosure [Abstract]
Other Long-Term Liabilities	7. Other Long-Term Liabilities Other long-term liabilities at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Unrecognized tax benefits, including interest $ 9,418 $ 9,313 Deferred tax liabilities, non-current 1,962 1,769 Software license liabilities, non-current 638 1,674 Other long-term liabilities 6 7 Total other long-term liabilities $ 12,024 $ 12,763

Capital Stock

Capital Stock	3 Months Ended
	Apr. 30, 2022
Equity [Abstract]
Capital Stock	8. Capital Stock Preference shares After completion of the Company’s initial public offering in 2012, 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 April 30, 2022 and January 31, 2022, respectively. Ordinary shares As of April 30, 2022 and January 31, 2022, a total of 200,000,000 ordinary shares were authorized. In the first quarter of fiscal year 2023, the Company added 466,285 ordinary shares to the ordinary shares reserved for issuance, pursuant to an “evergreen” provision contained in the Amended and Restated 2012 Employee Stock Purchase Plan, or ESPP. Pursuant to such provision, for each fiscal year, the number of ordinary shares reserved for issuance under the ESPP is automatically increased by a number equal to the lesser of (i) 1,500,000 ordinary shares, (ii) one and one quarter percent (1.25%) of the aggregate number of ordinary shares outstanding on February 1st of each fiscal year, or (iii) an amount determined by the Company’s Board of Directors or a duly authorized committee of the Board of Directors. As of April 30, 2022 and January 31, 2022, the following ordinary shares were reserved for future issuance under the Company’s equity plans and ESPP: As of April 30, 2022 January 31, 2022 Shares reserved for options, restricted stock and restricted stock units under equity plans 6,724,308 7,461,541 Shares reserved for ESPP 3,047,444 2,624,704 Stock purchase program No .

Stock-based Compensation

Stock-based Compensation	3 Months Ended
	Apr. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock-based Compensation	9. Stock-based Compensation The following table presents the classification of stock-based compensation for the periods indicated: Three Months Ended April 30, 2022 2021 (in thousands) Stock-based compensation: Cost of revenue $ 349 $ 323 Research and development 17,151 11,194 Selling, general and administrative 9,541 7,325 Total stock-based compensation $ 27,041 $ 18,842 As of April 30, 2022, approximately $1.0 million of stock-based compensation expense was accrued and reflected under accrued and other current liabilities in the condensed consolidated balance sheets. Total unrecognized compensation cost related to unvested stock options at April 30, 2022 was $24.8 million and is expected to be recognized over a weighted-average period of 2.39 years. Total unrecognized compensation cost related to unvested restricted stock units at April 30, 2022 was $207.1 million and is expected to be recognized over a weighted-average period of 2.43 years. In April 2022, the Company’s Compensation Committee of the Board of Directors approved the acceleration of vesting of 35,703 shares of unvested equity awards associated with the departure of Mr. Casey Eichler, who was the Company’s Chief Financial Officer until March 2022. As a result, there was approximately $1.7 million of additional stock-based compensation expense, net related to the departure recognized during the three months ended April 30, 2022. The following table sets forth the weighted-average assumptions used to estimate the fair value of stock options and employee stock purchase plan awards for the periods indicated: Three Months Ended April 30, 2022 2021 Stock Options: Volatility — 51 % Risk-free interest rate — 0.99 % Expected term (years) — 5.3 Dividend yield — 0 % Employee stock purchase plan awards: Volatility 89 % 61 % Risk-free interest rate 0.86 % 0.06 % Expected term (years) 0.5 0.5 Dividend yield 0 % 0 % The following table summarizes stock option activities for the period indicated: Option Outstanding Weighted- Total Average Weighted- Value Of Remaining Aggregate Weighted- Average Options Contractual Intrinsic Average Grant-date Exercised Term Value Shares Exercise Fair Value (in (in years) (in Outstanding at January 31, 2022 619,322 $ 40.08 Granted — — — Exercised (37,536 ) 23.17 $ 2,902 Forfeited (2,801 ) 35.95 Expired (14 ) 43.35 Outstanding at April 30, 2022 578,971 41.20 4.8 $ 38,249 Exercisable at April 30, 2022 390,006 $ 43.85 3.5 $ 24,711 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 April 30, 2022 was $82.08, as reported by The NASDAQ Global Market. The intrinsic value of exercised options is calculated based on the difference between the fair market value of the Company’s ordinary shares on the exercise date and the exercise price. The following table summarizes the restricted stock units activities for the period indicated: Weighted- Average Grant-Date Shares Fair Value Unvested at January 31, 2022 2,651,135 $ 85.41 Granted 615,737 85.44 Vested (698,980 ) 65.78 Forfeited (68,007 ) 82.10 Unvested at April 30, 2022 2,499,885 $ 91.00 As of April 30, 2022, the aggregate intrinsic value of unvested restricted stock units was $205.2 million.

Net Loss Per Ordinary Share

Net Loss Per Ordinary Share	3 Months Ended
	Apr. 30, 2022
Earnings Per Share [Abstract]
Net Loss Per Ordinary Share	10. 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 2022 2021 (in thousands, except share and per share data) Numerator: Net loss $ (10,822 ) $ (10,818 ) Denominator: Weighted-average ordinary shares - basic 37,715,338 35,940,304 Weighted-average ordinary shares - diluted 37,715,338 35,940,304 Net loss per ordinary share: Basic $ (0.29 ) $ (0.30 ) Diluted $ (0.29 ) $ (0.30 ) The following weighted-average potentially dilutive securities were excluded from the computation of diluted loss per ordinary share as their effect would have been antidilutive: Three Months Ended April 30, 2022 2021 Options to purchase ordinary shares 411,941 427,861 Restricted stock units 1,776,820 1,786,252 Employee stock purchase plan 11,010 22,870 2,199,771 2,236,983

Income Taxes

Income Taxes	3 Months Ended
	Apr. 30, 2022
Income Tax Disclosure [Abstract]
Income Taxes	11. Income Taxes The following table provides details of income taxes for the periods indicated: Three Months Ended April 30, 2022 2021 (in thousands) Loss before income taxes $ (10,412 ) $ (9,543 ) Provision for income taxes 410 1,275 Effective tax rate (3.9)% (13.4)% The Company recorded an income tax provision of $0.4 million and $1.3 million for the three months ended April 30, 2022 and 2021, respectively. The decrease in income tax expense was primarily due to an increase in the proportion of profits generated in lower tax jurisdictions. The Company files federal and state income tax returns in the United States and in various foreign jurisdictions. The Internal Revenue Service is currently examining the Company’s U.S. federal income tax return for the fiscal year ended January 31, 2017. The tax years 2013 to 2021 remain open to examination by U.S. federal tax authorities. The tax years 2009 to 2021 remain open to examination by U.S. state tax authorities. The tax years 2015 to 2021 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 April 30, 2022, the gross amount of unrecognized tax benefits was approximately $31.1 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.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Apr. 30, 2022
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12. Commitments and Contingencies Contract Manufacturer Commitments The Company’s components and products are procured and built by independent contract manufacturers based on sales forecasts. These forecasts include estimates of future demand, historical trends, analysis of sales and marketing activities, and adjustment of overall market conditions. The Company regularly issues purchase orders to independent contract manufacturers which are cancelable upon agreement between the Company and the third-party manufacturers. These manufacturing purchase commitments typically provide the Company with flexibility to cancel, reschedule or adjust requirements based upon business needs but the Company may incur certain costs depending on the production stage of the products. As of April 30, 2022 and January 31, 2022, total manufacturing purchase commitments were approximately $66.3 million and $71.5 million, respectively. The Company also reviews and assesses the need for any expected loss liabilities on a quarterly basis for all products that it does not expect to sell for which it has committed purchases from suppliers. As of April 30, 2022 and January 31, 2022, there were no material loss liabilities recorded in the condensed consolidated balance sheets from adverse purchase commitments. 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 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 and no liabilities have been recorded for these obligations in the condensed consolidated balance sheets as of April 30, 2022 and January 31, 2022, respectively.

Segment Reporting

Segment Reporting	3 Months Ended
	Apr. 30, 2022
Segment Reporting [Abstract]
Segment Reporting	13. Segment Reporting The Company operates in one reportable segment related to the development and sales of low-power, high-definition (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: Three Months Ended April 30, 2022 2021 (in thousands) Taiwan $ 53,636 $ 44,587 Asia Pacific 21,555 18,637 Europe 8,393 3,018 North America other than United States 4,886 2,690 United States 1,835 1,201 Total revenue $ 90,305 $ 70,133 As of April 30, 2022, substantially all of the Company’s property and equipment were located in the Asia Pacific region, United States and Europe with approximate net amounts of $5.4 million, $3.2 million and $1.5 million, respectively. Major Customers The customers representing 10% or more of revenue were WT, Chicony, and Hakuto, which accounted for approximately 57%, 11%, and 10% of total revenue for the three months ended April 30, 2022, respectively. For the three months ended April 30, 2021, the customers representing 10% or more of revenue were WT and Chicony, which accounted for approximately 63% and 16% of total revenue, respectively. Accounts receivable with WT, Chicony, and Hakuto were approximately $3.1 million, $10.5 million, and $0.6 million as of April 30, 2022, respectively.

Subsequent Events

Subsequent Events	3 Months Ended
	Apr. 30, 2022
Subsequent Events [Abstract]
Subsequent Events	14. Subsequent Events On May 27, 2022, the Company’s Board of Directors approved an extension of the current share repurchase program for an additional twelve months ending June 30, 2023. 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. As of June 7, 2022, there was approximately $49.0 million remained available for repurchases under the repurchase program through June 30, 2023.

Organization and Summary of S_2

Organization and Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Apr. 30, 2022
Accounting Policies [Abstract]
Organization	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 design manufacturers, or ODMs, and original equipment manufacturers, or OEMs, globally.
Basis of Presentation	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 2022 fiscal year filed with the SEC on April 1, 2022 (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	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.
Concentration of Risk	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 in Asia other than Japan, and Hakuto Co., Ltd., or Hakuto, a Japan distributor, and directly to one ODM customer, Chicony Electronics Co., Ltd., or Chicony. Termination of the relationships with these customers could result in a temporary or permanent loss of revenue. Furthermore, any credit issues from these customers could impair their abilities to make timely payment to the Company. See Note 13 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. The cash equivalents consist primarily of money market funds which management assesses to be highly liquid. In fiscal year 2022, the Company fully liquidated its investments in debt securities to finance the acquisition of Oculii Corp, or Oculii. As of April 30, 2022 and January 31, 2022, there were no debt security investments recorded in the condensed consolidated balance sheets. 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	Restricted Cash Amounts included in restricted cash represent those required to be set aside to secure certain transactions in a foreign entity. As of April 30, 2022 and January 31, 2022, 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 April 30, 2022 January 31, 2022 April 30, 2021 January 31, 2021 (in thousands) Cash and cash equivalents $ 200,639 $ 171,043 $ 227,509 $ 241,274 Restricted cash 10 10 10 10 Total as presented in the condensed consolidated statements of cash flows $ 200,649 $ 171,053 $ 227,519 $ 241,284
Recent Accounting Pronouncements	Recent Accounting Pronouncements None.

Organization and Summary of S_3

Organization and Summary of Significant Accounting Policies (Tables)	3 Months Ended
	Apr. 30, 2022
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 April 30, 2022 January 31, 2022 April 30, 2021 January 31, 2021 (in thousands) Cash and cash equivalents $ 200,639 $ 171,043 $ 227,509 $ 241,274 Restricted cash 10 10 10 10 Total as presented in the condensed consolidated statements of cash flows $ 200,649 $ 171,053 $ 227,519 $ 241,284

Inventories (Tables)

Inventories (Tables)	3 Months Ended
	Apr. 30, 2022
Inventory Disclosure [Abstract]
Schedule of Inventory	Inventories at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Work-in-progress $ 32,892 $ 25,844 Finished goods 8,631 19,375 Total $ 41,523 $ 45,219

Property and Equipment, Net (Ta

Property and Equipment, Net (Tables)	3 Months Ended
	Apr. 30, 2022
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Computer equipment and software $ 17,133 $ 16,488 Machinery and equipment 7,757 7,532 Furniture and fixtures 1,253 1,243 Leasehold improvements 3,065 2,942 Construction in progress 806 1,060 30,014 29,265 Less: accumulated depreciation and amortization (19,876 ) (19,131 ) Total property and equipment, net $ 10,138 $ 10,134

Intangible Assets, Net (Tables)

Intangible Assets, Net (Tables)	3 Months Ended
	Apr. 30, 2022
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Components of Intangible Assets	The components of intangible assets as of April 30, 2022 and January 31, 2022 were as follows : As of April 30, 2022 As of January 31, 2022 Gross Carrying Amount Accumulated Amortization Net Carrying Amount Gross Carrying Amount Accumulated Amortization Net Carrying Amount (in thousands) Software licenses $ 26,635 $ (12,486 ) $ 14,149 $ 22,093 $ (11,331 ) $ 10,762 Developed technology 21,200 (1,661 ) 19,539 21,200 (904 ) 20,296 Customer relationships 13,200 (733 ) 12,467 13,200 (367 ) 12,833 Trade name 2,500 (178 ) 2,322 2,500 (89 ) 2,411 Total intangible assets, net $ 63,535 $ (15,058 ) $ 48,477 $ 58,993 $ (12,691 ) $ 46,302
Summary of Expected Future Amortization Expense Related to Intangible Assets	The expected future amortization expense related to these intangible assets as of April 30, 2022 is as follows: As of April 30, 2022 Fiscal Year (in thousands) 2023 (9 months remaining) $ 7,693 2024 8,211 2025 6,971 2026 5,408 2027 5,405 Thereafter 14,789 Total future amortization expenses: $ 48,477

Accrued and Other Current Lia_2

Accrued and Other Current Liabilities (Tables)	3 Months Ended
	Apr. 30, 2022
Payables And Accruals [Abstract]
Schedule of Accrued and Other Current Liabilities	Accrued and other current liabilities at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Accrued employee compensation $ 20,751 $ 30,044 Accrued product development costs 6,992 10,523 Software license liabilities, current 4,947 6,001 Other accrued liabilities 6,664 5,496 Total accrued and other current liabilities $ 39,354 $ 52,064

Leases (Tables)

Leases (Tables)	3 Months Ended
	Apr. 30, 2022
Leases [Abstract]
Schedule of Supplemental Cash Flow Information Related to Leases	Supplemental cash flow information related to leases is as follows: Three Months Ended April 30, 2022 (in thousands) Cash paid for operating leases included in operating cash flows $ 1,069 Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets $ 87
Schedule of Future Minimum Lease Payments for Lease Liabilities	As of April 30, 2022, the weighted average remaining lease term is 3.39 years, and the weighted average discount rate is 3.56 percent. Future minimum lease payments for the lease liabilities are as follows : As of April 30, 2022 Fiscal Year (in thousands) 2023 (9 months remaining) $ 2,737 2024 3,443 2025 3,240 2026 1,421 2027 344 Thereafter 123 Total future annual minimum lease payments 11,308 Less: interest (577 ) Total lease liabilities $ 10,731

Other Long-Term Liabilities (Ta

Other Long-Term Liabilities (Tables)	3 Months Ended
	Apr. 30, 2022
Other Liabilities Disclosure [Abstract]
Schedule of Other Long-Term Liabilities	Other long-term liabilities at April 30, 2022 and January 31, 2022 consisted of the following: As of April 30, 2022 January (in thousands) Unrecognized tax benefits, including interest $ 9,418 $ 9,313 Deferred tax liabilities, non-current 1,962 1,769 Software license liabilities, non-current 638 1,674 Other long-term liabilities 6 7 Total other long-term liabilities $ 12,024 $ 12,763

Capital Stock (Tables)

Capital Stock (Tables)	3 Months Ended
	Apr. 30, 2022
Equity [Abstract]
Schedule of Ordinary Shares Reserved for Future Issuance under Company's Equity Plans and ESPP	As of April 30, 2022 and January 31, 2022, the following ordinary shares were reserved for future issuance under the Company’s equity plans and ESPP: As of April 30, 2022 January 31, 2022 Shares reserved for options, restricted stock and restricted stock units under equity plans 6,724,308 7,461,541 Shares reserved for ESPP 3,047,444 2,624,704

Stock-based Compensation (Table

Stock-based Compensation (Tables)	3 Months Ended
	Apr. 30, 2022
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Classification of Stock-based Compensation	The following table presents the classification of stock-based compensation for the periods indicated: Three Months Ended April 30, 2022 2021 (in thousands) Stock-based compensation: Cost of revenue $ 349 $ 323 Research and development 17,151 11,194 Selling, general and administrative 9,541 7,325 Total stock-based compensation $ 27,041 $ 18,842
Weighted-Average Assumptions Used to Estimate Fair Value	The following table sets forth the weighted-average assumptions used to estimate the fair value of stock options and employee stock purchase plan awards for the periods indicated: Three Months Ended April 30, 2022 2021 Stock Options: Volatility — 51 % Risk-free interest rate — 0.99 % Expected term (years) — 5.3 Dividend yield — 0 % Employee stock purchase plan awards: Volatility 89 % 61 % Risk-free interest rate 0.86 % 0.06 % Expected term (years) 0.5 0.5 Dividend yield 0 % 0 %
Stock Option Activities	The following table summarizes stock option activities for the period indicated: Option Outstanding Weighted- Total Average Weighted- Value Of Remaining Aggregate Weighted- Average Options Contractual Intrinsic Average Grant-date Exercised Term Value Shares Exercise Fair Value (in (in years) (in Outstanding at January 31, 2022 619,322 $ 40.08 Granted — — — Exercised (37,536 ) 23.17 $ 2,902 Forfeited (2,801 ) 35.95 Expired (14 ) 43.35 Outstanding at April 30, 2022 578,971 41.20 4.8 $ 38,249 Exercisable at April 30, 2022 390,006 $ 43.85 3.5 $ 24,711
Restricted Stock Units Activities	The following table summarizes the restricted stock units activities for the period indicated: Weighted- Average Grant-Date Shares Fair Value Unvested at January 31, 2022 2,651,135 $ 85.41 Granted 615,737 85.44 Vested (698,980 ) 65.78 Forfeited (68,007 ) 82.10 Unvested at April 30, 2022 2,499,885 $ 91.00

Net Loss Per Ordinary Share (Ta

Net Loss Per Ordinary Share (Tables)	3 Months Ended
	Apr. 30, 2022
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 2022 2021 (in thousands, except share and per share data) Numerator: Net loss $ (10,822 ) $ (10,818 ) Denominator: Weighted-average ordinary shares - basic 37,715,338 35,940,304 Weighted-average ordinary shares - diluted 37,715,338 35,940,304 Net loss per ordinary share: Basic $ (0.29 ) $ (0.30 ) Diluted $ (0.29 ) $ (0.30 )
Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Loss Per Ordinary Share	The following weighted-average potentially dilutive securities were excluded from the computation of diluted loss per ordinary share as their effect would have been antidilutive: Three Months Ended April 30, 2022 2021 Options to purchase ordinary shares 411,941 427,861 Restricted stock units 1,776,820 1,786,252 Employee stock purchase plan 11,010 22,870 2,199,771 2,236,983

Income Taxes (Tables)

Income Taxes (Tables)	3 Months Ended
	Apr. 30, 2022
Income Tax Disclosure [Abstract]
Summary of Income Taxes	The following table provides details of income taxes for the periods indicated: Three Months Ended April 30, 2022 2021 (in thousands) Loss before income taxes $ (10,412 ) $ (9,543 ) Provision for income taxes 410 1,275 Effective tax rate (3.9)% (13.4)%

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Apr. 30, 2022
Segment Reporting [Abstract]
Company's Revenue by Geographic Region Based on Bill-to Location	The following table sets forth the Company’s revenue by geographic region based on bill-to location for the periods indicated: Three Months Ended April 30, 2022 2021 (in thousands) Taiwan $ 53,636 $ 44,587 Asia Pacific 21,555 18,637 Europe 8,393 3,018 North America other than United States 4,886 2,690 United States 1,835 1,201 Total revenue $ 90,305 $ 70,133

Organization and Summary of S_4

Organization and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	Apr. 30, 2022	Jan. 31, 2022
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Debt security investment	$ 0	$ 0

Organization and Summary of S_5

Organization and Summary of Significant Accounting Policies - Schedule of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022	Apr. 30, 2021	Jan. 31, 2021
Cash And Cash Equivalents [Abstract]
Cash and cash equivalents	$ 200,639	$ 171,043	$ 227,509	$ 241,274
Restricted cash	10	10	10	10
Total as presented in the condensed consolidated statements of cash flows	$ 200,649	$ 171,053	$ 227,519	$ 241,284

Inventories - Schedule of Inven

Inventories - Schedule of Inventory (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Inventory Disclosure [Abstract]
Work-in-progress	$ 32,892	$ 25,844
Finished goods	8,631	19,375
Total	$ 41,523	$ 45,219

Property and Equipment, Net - A

Property and Equipment, Net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Property Plant And Equipment [Abstract]
Depreciation of property and equipment	$ 0.9	$ 0.6

Property and Equipment, Net - S

Property and Equipment, Net - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 30,014	$ 29,265
Less: accumulated depreciation and amortization	(19,876)	(19,131)
Total property and equipment, net	10,138	10,134
Computer equipment and software [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	17,133	16,488
Machinery and equipment [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	7,757	7,532
Furniture and fixtures [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	1,253	1,243
Leasehold improvements [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	3,065	2,942
Construction in progress [Member]
Property Plant And Equipment [Line Items]
Property and equipment, gross	$ 806	$ 1,060

Intangible Assets, Net - Additi

Intangible Assets, Net - Additional Information (Detail) - USD ($)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021	Jan. 31, 2022
Finite Lived Intangible Assets [Line Items]
Liabilities associated with software license at net present value, current	$ 4,947,000		$ 6,001,000
Liabilities associated with software license at net present value, non-current	638,000		$ 1,674,000
Amortization expense associate with acquisition-related intangible assets	1,200,000	$ 0
Impairment of intangible assets	0	0
Internal-use software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Software licenses purchased	4,900,000
Fully amortized software licenses retired	400,000
Amortization expense	$ 1,600,000	$ 1,500,000

Intangible Assets, Net - Summar

Intangible Assets, Net - Summary of Components of Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 63,535	$ 58,993
Accumulated Amortization	(15,058)	(12,691)
Net Carrying Amount	48,477	46,302
Software licenses [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	26,635	22,093
Accumulated Amortization	(12,486)	(11,331)
Net Carrying Amount	14,149	10,762
Developed technology [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	21,200	21,200
Accumulated Amortization	(1,661)	(904)
Net Carrying Amount	19,539	20,296
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	13,200	13,200
Accumulated Amortization	(733)	(367)
Net Carrying Amount	12,467	12,833
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,500	2,500
Accumulated Amortization	(178)	(89)
Net Carrying Amount	$ 2,322	$ 2,411

Intangible Assets, Net - Summ_2

Intangible Assets, Net - Summary of Expected Future Amortization Expense Related to Intangible Assets (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Goodwill And Intangible Assets Disclosure [Abstract]
2023 (9 months remaining)	$ 7,693
2024	8,211
2025	6,971
2026	5,408
2027	5,405
Thereafter	14,789
Net Carrying Amount	$ 48,477	$ 46,302

Accrued and Other Current Lia_3

Accrued and Other Current Liabilities - Schedule of Accrued and Other Current Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Payables And Accruals [Abstract]
Accrued employee compensation	$ 20,751	$ 30,044
Accrued product development costs	6,992	10,523
Software license liabilities, current	4,947	6,001
Other accrued liabilities	6,664	5,496
Total accrued and other current liabilities	$ 39,354	$ 52,064

Accrued and Other Current Lia_4

Accrued and Other Current Liabilities - Additional Information (Detail) $ in Millions	3 Months Ended
	Apr. 30, 2022USD ($)
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 10.9
Cash [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	3.2
Restricted stock units [Member]
Schedule of Accrued Liabilities [Line Items]
Annual bonus paid	$ 7.7

Leases - Additional Information

Leases - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Leases [Abstract]
Operating lease expense	$ 0.9	$ 0.8
Weighted-average remaining lease term - operating leases	3 years 4 months 20 days
Weighted-average discount rate - operating leases	3.56%

Leases - Schedule of Supplement

Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Detail) $ in Thousands	3 Months Ended
	Apr. 30, 2022USD ($)
Leases [Abstract]
Cash paid for operating leases included in operating cash flows	$ 1,069
Supplemental non-cash information related to lease liabilities arising from obtaining right-of-use assets	$ 87

Leases - Schedule of Future Min

Leases - Schedule of Future Minimum Lease Payments for Lease Liabilities (Detail) $ in Thousands	Apr. 30, 2022USD ($)
Leases [Abstract]
2023 (9 months remaining)	$ 2,737
2024	3,443
2025	3,240
2026	1,421
2027	344
Thereafter	123
Total future annual minimum lease payments	11,308
Less: interest	(577)
Total lease liabilities	$ 10,731

Other Long-Term Liabilities - S

Other Long-Term Liabilities - Schedule of Other Long-Term Liabilities (Detail) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Other Liabilities Disclosure [Abstract]
Unrecognized tax benefits, including interest	$ 9,418	$ 9,313
Deferred tax liabilities, non-current	1,962	1,769
Software license liabilities, non-current	638	1,674
Other long-term liabilities	6	7
Total other long-term liabilities	$ 12,024	$ 12,763

Capital Stock - Additional Info

Capital Stock - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 30, 2022	Jan. 31, 2022
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
Ordinary shares, shares authorized	200,000,000	200,000,000
Stock repurchased, shares	0
Amount available under stock repurchase program	$ 49
ESPP [Member]
Class Of Stock [Line Items]
Additional ordinary shares reserved for issuance	466,285
ESPP [Member] | Scenario, plan automatically increased by the lessor of [Member]
Class Of Stock [Line Items]
Annual increase in ordinary shares for available for future issuance	1,500,000
Annual shares increase for future issuance by percentage under 2012 employee stock purchase plan	1.25%

Capital Stock - Schedule of Ord

Capital Stock - Schedule of Ordinary Shares Reserved for Future Issuance under Company's Equity Plans and ESPP (Detail) - shares	Apr. 30, 2022	Jan. 31, 2022
Equity Plans [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	6,724,308	7,461,541
ESPP [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares reserved	3,047,444	2,624,704

Stock-based Compensation - Clas

Stock-based Compensation - Classification of Stock-based Compensation (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Stock-based compensation:
Total stock-based compensation	$ 27,041	$ 18,842
Cost of revenue [Member]
Stock-based compensation:
Total stock-based compensation	349	323
Research and development [Member]
Stock-based compensation:
Total stock-based compensation	17,151	11,194
Selling, general and administrative [Member]
Stock-based compensation:
Total stock-based compensation	$ 9,541	$ 7,325

Stock-based Compensation - Addi

Stock-based Compensation - Additional Information (Detail) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2022USD ($)$ / sharesshares	Apr. 30, 2022USD ($)$ / shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Accrued stock-based compensation expense liabilities	$ 1	$ 1
Closing price of ordinary shares | $ / shares	$ 82.08	$ 82.08
Mr. Casey Eichler [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Acceleration of vesting of shares of unvested equity awards | shares	35,703
Additional stock-based compensation expense, net related to departure recognized		$ 1.7
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, stock options	$ 24.8	$ 24.8
Weighted average recognition period		2 years 4 months 20 days
Restricted stock units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Total unrecognized compensation cost, restricted stock units	207.1	$ 207.1
Weighted average recognition period		2 years 5 months 4 days
Aggregate intrinsic value of unvested restricted stock units	$ 205.2	$ 205.2

Stock-based Compensation - Weig

Stock-based Compensation - Weighted-Average Assumptions Used to Estimate Fair Value (Detail)	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Stock options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility		51.00%
Risk-free interest rate		0.99%
Expected term (years)		5 years 3 months 18 days
Dividend yield		0.00%
Employee stock purchase plan awards [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Volatility	89.00%	61.00%
Risk-free interest rate	0.86%	0.06%
Expected term (years)	6 months	6 months
Dividend yield	0.00%	0.00%

Stock-based Compensation - Stoc

Stock-based Compensation - Stock Option Activities (Detail) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2022USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Shares, Outstanding | shares	619,322
Shares, Exercised | shares	(37,536)
Shares, Forfeited | shares	(2,801)
Shares, Expired | shares	(14)
Shares, Outstanding | shares	578,971
Shares, Exercisable | shares	390,006
Weighted-Average Exercise Price, Outstanding | $ / shares	$ 40.08
Weighted-Average Exercise Price, Exercised | $ / shares	23.17
Weighted-Average Exercise Price, Forfeited | $ / shares	35.95
Weighted-Average Exercise Price, Expired | $ / shares	43.35
Weighted-Average Exercise Price, Outstanding | $ / shares	41.20
Weighted-Average Exercise Price, Exercisable | $ / shares	$ 43.85
Total Intrinsic Value Of Options Exercised | $	$ 2,902
Weighted-Average Remaining Contractual Term, Outstanding	4 years 9 months 18 days
Weighted-Average Remaining Contractual Term, Exercisable	3 years 6 months
Aggregate Intrinsic Value, Outstanding | $	$ 38,249
Aggregate Intrinsic Value, Exercisable | $	$ 24,711

Stock-based Compensation - Rest

Stock-based Compensation - Restricted Stock Units Activities (Detail) - Restricted Stock Units [Member]	3 Months Ended
	Apr. 30, 2022$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Shares, Unvested, beginning balance | shares	2,651,135
Shares, Granted | shares	615,737
Shares, Vested | shares	(698,980)
Shares, Forfeited | shares	(68,007)
Shares, Unvested, ending balance | shares	2,499,885
Weighted-Average Grant-Date Fair Value, Unvested, beginning balance | $ / shares	$ 85.41
Weighted-Average Grant-Date Fair Value, Granted | $ / shares	85.44
Weighted-Average Grant-Date Fair Value, Vested | $ / shares	65.78
Weighted-Average Grant-Date Fair Value, Forfeited | $ / shares	82.10
Weighted-Average Grant-Date Fair Value, Unvested, ending balance | $ / shares	$ 91

Net Loss Per Ordinary Share - C

Net Loss Per Ordinary Share - Computation of Basic and Diluted Loss Per Ordinary Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Numerator:
Net loss	$ (10,822)	$ (10,818)
Denominator:
Weighted-average ordinary shares - basic	37,715,338	35,940,304
Weighted-average ordinary shares - diluted	37,715,338	35,940,304
Net loss per ordinary share:
Basic	$ (0.29)	$ (0.30)
Diluted	$ (0.29)	$ (0.30)

Net Loss Per Ordinary Share - W

Net Loss Per Ordinary Share - Weighted-Average Potentially Dilutive Securities Excluded from Computation of Diluted Loss Per Ordinary Share (Detail) - shares	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	2,199,771	2,236,983
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	411,941	427,861
Restricted stock units [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive shares excluded from computation of earnings per share	1,776,820	1,786,252
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	11,010	22,870

Income Taxes - Summary of Incom

Income Taxes - Summary of Income Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (10,412)	$ (9,543)
Provision for income taxes	$ 410	$ 1,275
Effective tax rate	(3.90%)	(13.40%)

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Income Taxes [Line Items]
Income tax provision	$ 410	$ 1,275
Unrecognized tax benefits	$ 31,100
U.S. federal tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2013
U.S. federal tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2021
U.S. state tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2009
U.S. state tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2021
Foreign tax authorities [Member] | Earliest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2015
Foreign tax authorities [Member] | Latest tax year [Member]
Income Taxes [Line Items]
Income tax examination, year	2021

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Apr. 30, 2022	Jan. 31, 2022
Loss Contingencies [Line Items]
Total manufacturing purchase commitments	$ 66,300,000	$ 71,500,000
Indemnification agreement [Member]
Loss Contingencies [Line Items]
Payments under indemnification obligations	0	0
Liabilities recorded under indemnification obligations	$ 0	$ 0

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail) $ in Thousands	3 Months Ended
	Apr. 30, 2022USD ($)Segment	Apr. 30, 2021	Jan. 31, 2022USD ($)
Concentration Risk [Line Items]
Number of reportable segments | Segment	1
Property and equipment, net	$ 10,138		$ 10,134
Accounts receivable	$ 28,008		$ 44,307
Sales revenue, net [Member] | WT [Member] | Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	57.00%	63.00%
Sales revenue, net [Member] | Chicony [Member] | Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	11.00%	16.00%
Sales revenue, net [Member] | Hakuto [Member] | Customer concentration risk [Member]
Concentration Risk [Line Items]
Percentage of revenue	10.00%
Accounts receivable [Member] | WT [Member] | Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	$ 3,100
Accounts receivable [Member] | Chicony [Member] | Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	10,500
Accounts receivable [Member] | Hakuto [Member] | Credit concentration risk [Member]
Concentration Risk [Line Items]
Accounts receivable	600
United States [Member]
Concentration Risk [Line Items]
Property and equipment, net	5,400
Asia Pacific [Member]
Concentration Risk [Line Items]
Property and equipment, net	3,200
Europe [Member]
Concentration Risk [Line Items]
Property and equipment, net	$ 1,500

Segment Reporting - Company's R

Segment Reporting - Company's Revenue by Geographic Region Based on Bill-to Location (Detail) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2022	Apr. 30, 2021
Revenue from External Customer [Line Items]
Total revenue	$ 90,305	$ 70,133
Taiwan [Member]
Revenue from External Customer [Line Items]
Total revenue	53,636	44,587
Asia Pacific [Member]
Revenue from External Customer [Line Items]
Total revenue	21,555	18,637
Europe [Member]
Revenue from External Customer [Line Items]
Total revenue	8,393	3,018
North America other than United States [Member]
Revenue from External Customer [Line Items]
Total revenue	4,886	2,690
United States [Member]
Revenue from External Customer [Line Items]
Total revenue	$ 1,835	$ 1,201

Subsequent Events - Additional

Subsequent Events - Additional Information (Detail) - USD ($) $ in Millions	May 27, 2022	Jun. 07, 2022	Apr. 30, 2022
Subsequent Event [Line Items]
Amount remaining available under stock repurchase program			$ 49
Stock Repurchase Program $50.0 Million Authorization [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Stock repurchase program, extended expiration period	12 months
Stock repurchase program, extended expiration date	Jun. 30, 2023
Amount remaining available under stock repurchase program		$ 49