Fair Value Measurements - Narrative (Details) - USD ($)	3 Months Ended		12 Months Ended
	Apr. 30, 2025	Apr. 30, 2024	Jan. 31, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investment in non-marketable equity securities	$ 28,700,000		$ 24,200,000
Non-marketable Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Payments to acquire investments	5,000,000	$ 0
U.S. government treasury securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total short-term investments	$ 8,399,000		$ 1,542,000