Leases - ASC 842 Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Leases [Abstract]
Operating lease cost	$ 1,419	$ 1,269
Short-term lease cost	104	108
Sublease income	(10)	(10)
Variable lease (benefit) cost	(72)	261
Total lease cost	1,441	1,628
Cash paid for amounts included in the measurement of lease liabilities	1,621	1,433
Right-of-use assets obtained in exchange for new lease liabilities	$ 954	$ 292
Weighted-average remaining lease term (years)	1 year 2 months 12 days	2 years 2 months 12 days
Weighted-average discount rate	6.36%	6.33%