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Fair Value Measurements (Details Narrative) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jul. 31, 2022 | Apr. 30, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Fair value of investments | $ 42.7 | $ 49.4
Fair Value, Inputs, Level 3 [Member] |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Contingent liability MAR acquisition amount | 1.5 |
Decrease in contingent liability | 0.1 |
Fair value of contingent consideration | $ 1.6 |

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