Leases - ASC 842 Quantitative Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2025	Jul. 31, 2024	Jul. 31, 2025	Jul. 31, 2024
Leases [Abstract]
Operating lease cost	$ 2,359	$ 1,423	$ 4,717	$ 2,842
Short-term lease cost	112	130	230	234
Sublease income	(10)	(10)	(20)	(20)
Variable lease cost	109	690	382	618
Total lease cost	$ 2,570	$ 2,233	5,309	3,674
Cash paid for amounts included in the measurement of lease liabilities			1,936	3,260
Right-of-use assets obtained in exchange for new lease liabilities			$ 331	$ 34,012
Weighted-average remaining lease term (years)	5 years	6 years	5 years	6 years
Weighted-average discount rate	9.83%	9.78%	9.83%	9.78%