Operating Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Lease Cost [Abstract]
Operating lease costs	$ 3,861	$ 3,947	$ 2,796
Variable lease costs	972	948	1,062
Total lease cost	$ 4,833	$ 4,895	$ 3,858