Income Taxes - Components of Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Jan. 31, 2023	Jan. 31, 2022
Deferred tax assets:
Accruals and reserves	$ 386	$ 79
Deferred revenue	919	801
Stock-based compensation expense	143	232
U.S. federal, state and foreign tax credits	7,659	7,146
Property and equipment	44	219
Lease liabilities	321	510
Intangible assets	154	44
Other	57	419
Loss carryforwards	33,650	36,161
Capitalized R&D costs for tax purposes	2,009
Deferred tax assets	45,342	45,611
Less: Valuation allowance	(44,960)	(44,920)
Deferred tax assets, net of valuation allowance	382	691
Deferred tax liabilities:
Right-of-use assets	(321)	(510)
Other	(61)	(181)
Deferred tax liabilities	$ (382)	$ (691)