Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Deferred tax assets:
Federal and state credits	$ 33,485	$ 24,394
Net operating losses	7,466	0
Expenses not currently deductible	1,294	939
Operating lease liabilities	2,096	2,144
Stock-based compensation	3,632	3,349
Foreign deferred	191	184
Gross deferred tax assets	48,164	31,010
Valuation allowance	(24,083)	(17,962)
Total deferred tax assets	24,081	13,048
Deferred tax liabilities
Intangible assets	(8,150)	0
Property and equipment	(386)	(1,443)
Operating lease assets	(1,971)	(1,978)
Net deferred tax assets	$ 13,574	$ 9,627