Revenue and Deferred Revenue - Components of Deferred Revenue (Details) - USD ($) $ in Thousands	Jan. 31, 2022	Jan. 31, 2021
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 16,673	$ 16,501
Less: current deferred revenue	16,600	16,426
Non-current deferred revenue included in other long-term liabilities	73	75
Subscription and Services
Deferred Revenue Arrangement [Line Items]
Deferred revenue	16,614	16,433
Product and Other
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 59	$ 68