Income Taxes - Summary of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Deferred tax assets:
Net operating loss carryforwards	$ 34,808	$ 33,211
Tax credit carryover	10,905	8,963
Operating lease right-of-use assets	3,482	1,686
Stock-based compensation	1,114	1,101
Acquired intangible assets	256	53
Deferred revenue	18	19
Other	26	14
Gross deferred tax assets	50,609	45,047
Valuation allowance	(45,111)	(42,153)
Net deferred tax assets	5,498	2,894
Deferred tax liabilities:
Operating lease liabilities	(3,468)	(1,533)
Accruals and reserves	(1,994)	(1,265)
Fixed assets depreciation	(36)	(96)
Gross deferred tax liabilities	$ (5,498)	$ (2,894)