Fair Value Measurements - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Apr. 30, 2025	Jul. 31, 2025	Jul. 31, 2024	Jan. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in non-marketable equity securities		$ 32,200		$ 24,200
Unrealized loss, marketable security		0	$ 0
Non-marketable Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments to acquire investments		8,500	$ 5,500
U.S. government treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total short-term investments	$ 1,542	$ 2,549