v3.26.1
Fair Value Measurements - Additional Information (Details) - USD ($)
 3 Months Ended 12 Months Ended
Apr. 30, 2026
Jan. 31, 2026
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Transfers into level 1 to level 2, assets $ 0  
Transfers into level 2 to level 1, assets 0  
Transfers into level 1 to level 2, liabilities 0  
Transfers into level 2 to level 1, liabilities 0  
Transfers into level 3, assets 0  
Transfers out of level 3, assets 0  
Transfers into level 3, liabilities 0  
Transfers out of level 3, liabilities 0  
Investment in venture capital funds 500,000 $ 17,500,000
Impairment charges or observable price changes related venture funds $ 0  
Short-term investment    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair value, investment The fair value of the short-term investment, which is a guaranteed investment certificate, is based on its purchase price plus one half of one percent calculated annually.