Leases - ASC 842 Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2022	Oct. 31, 2021
Leases [Abstract]
Operating lease cost	$ 1,288	$ 1,358	$ 3,903	$ 3,878
Short-term lease cost	113	93	289	258
Sublease income	(10)	(10)	(30)	(30)
Variable lease cost	16	14	547	621
Total lease cost	$ 1,407	$ 1,455	4,709	4,727
Cash paid for amounts included in the measurement of lease liabilities			4,306	4,172
Right-of-use assets obtained in exchange for new lease liabilities			$ 469	$ 330
Weighted-average remaining lease term (years)	2 years 4 months 24 days	3 years 4 months 24 days	2 years 4 months 24 days	3 years 4 months 24 days
Weighted-average discount rate	6.30%	6.40%	6.30%	6.40%