Accounts Payable, Accrued Expenses and Other Current Liabilities (Details) - USD ($) $ in Thousands	Oct. 31, 2025	Jan. 31, 2025
Restructuring Cost and Reserve [Line Items]
Accounts payable	$ 3,965	$ 4,771
Accrued employee compensation	15,545	29,153
Accrued Publisher Network fees	2,930	4,051
Accrued professional services and associated costs	3,052	3,131
Accrued employee stock purchase plan withholdings liability	498	1,565
Other current liabilities	13,040	27,351
Total accounts payable, accrued expenses and other current liabilities	39,030	70,022
Hearsay
Restructuring Cost and Reserve [Line Items]
Accrued employee compensation	$ 300	8,600
Escrow funds related to indemnity claims		9,700
Incentive pool allocated to founders and early employees		$ 8,800