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Fair Value Measurements - (Details) - Recurring basis - USD ($)
$ in Thousands
Apr. 30, 2024
Apr. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities $ 937 $ 4,714
Warrants 90 255
Total 1,027 4,969
Contingent consideration   2,109
Total   2,109
Quoted prices in active market for identical assets (Level 1)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Equity securities 937 4,714
Total 937 4,714
Significant other observable inputs (Level 2)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Warrants 90 255
Total $ 90 255
Significant unobservable inputs (Level 3)    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Contingent consideration   2,109
Total   $ 2,109