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Equity Investments (Details Narrative) - USD ($) $ in Thousands |  |  |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 10, 2022 | Aug. 10, 2021 | Feb. 02, 2021 | Apr. 30, 2022 | Apr. 30, 2021 | Apr. 30, 2022 | Apr. 30, 2021 | Jul. 31, 2021
Payments to Acquire Equity Method Investments |  |  |  |  |  | $ 1,051 | $ 4,000 |
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity |  | $ 1,000 | $ 3,400 |  |  |  |  |
Equity Method Investee [Member] |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  |  |  | $ 4,000 | $ 1,051 | 4,000 |
Receivable with Imputed Interest, Face Amount | $ 1,000 |  |  |  |  |  |  |
Receivable with Imputed Interest, Effective Yield (Interest Rate) | 15.00% |  |  |  |  |  |  |
Receivable with Imputed Interest, Due Date | Aug. 03, 2022 |  |  |  |  |  |  |
Unrestricted Common Class B [Member] | Rafael Holdings Inc. [Member] |  |  |  |  |  |  |  |
Related party shares received |  |  |  |  |  | 28,320 |  |
Class B Common Stock [Member] | Rafael Holdings Inc. [Member] |  |  |  |  |  |  |  |
Investment Owned, Balance, Shares |  |  |  |  |  |  |  | 261,894
Unrealized losses |  |  |  | 600 |  | $ 14,100 |  |
Equity Securities, FV-NI, Unrealized Gain |  |  |  |  | $ 4,800 |  | $ 5,600 |
Restricted Common Class B [Member] | Rafael Holdings Inc. [Member] |  |  |  |  |  |  |  |
Related party shares received |  |  |  |  |  |  |  | 43,649
Visa Series C Convertible Participating Preferred Stock [Member] |  |  |  |  |  |  |  |
Equity Securities without Readily Determinable Fair Value, Downward Price Adjustment, Annual Amount |  |  |  | 100 |  | 300 |  |
Equity Securities without Readily Determinable Fair Value, Upward Price Adjustment, Annual Amount |  |  |  | $ 400 |  | $ 400 |  |
Series B Convertible Preferred Stock [Member] | Equity Method Investee [Member] |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  |  | $ 4,000 |  |  |  |  |
Equity Method Investment, Ownership Percentage |  |  | 23.95% |  |  |  |  |
Series C Convertible Preferred Stock [Member] | Equity Method Investee [Member] |  |  |  |  |  |  |  |
Payments to Acquire Equity Method Investments |  | $ 1,100 |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 26.57% |  |  |  |  |  |

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