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Fair Value Measurements - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended 12 Months Ended
Jul. 31, 2025
Jul. 31, 2025
Jan. 31, 2025
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]      
Transfers into level 1 to level 2, assets $ 0 $ 0  
Transfers into level 2 to level 1, assets 0 0  
Transfers into level 1 to level 2, liabilities 0 0  
Transfers into level 2 to level 1, liabilities 0 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   $ 1,900,000 $ 14,100,000
Non-cash impairment charge $ 400,000    
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.