Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Jan. 31, 2025	Jan. 31, 2024
Deferred tax assets:
Federal and state credits	$ 59,102	$ 51,344
Net operating losses	6,333	6,099
Expenses not currently deductible	3,822	3,988
Operating lease liabilities	611	1,009
Stock-based compensation	2,877	3,820
Other deferred tax assets	496	220
Gross deferred tax assets	73,241	66,480
Valuation allowance	(68,047)	(60,036)
Total deferred tax assets	5,194	6,444
Deferred tax liabilities
Intangible assets	(4,379)	(5,722)
Property and equipment	(450)	(460)
Operating lease assets	(839)	(918)
Net deferred tax liabilities	$ (474)	$ (656)