Leases - ASC 842 Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2026	Jul. 31, 2025	Jul. 31, 2026	Jul. 31, 2025
Leases [Abstract]
Operating lease cost	$ 2,301	$ 2,359	$ 4,613	$ 4,717
Short-term lease cost	118	112	236	230
Sublease income	(10)	(10)	(20)	(20)
Variable lease cost	404	109	801	382
Total lease cost	$ 2,813	$ 2,570	5,630	5,309
Cash paid for amounts included in the measurement of lease liabilities			4,795	1,936
Right-of-use assets obtained in exchange for new lease liabilities			$ 0	$ 331
Weighted-average remaining lease term (years)	4 years 1 month 6 days	5 years	4 years 1 month 6 days	5 years
Weighted-average discount rate	9.85%	9.83%	9.85%	9.83%