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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

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