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Schedule of Equity Investments (Details) - USD ($) $ in Thousands | Apr. 30, 2022 | Jul. 31, 2021
--- | --- | ---
Current equity investments | $ 16,179 | $ 42,434
Noncurrent equity investments | 7,319 | 11,654
Other Marketable Equity Securities [Member] |  |
Current equity investments | 3,048 | 3,630
Mutual Fund [Member] |  |
Current equity investments | 12,290 | 23,467
Hedge Funds [Member] |  |
Noncurrent equity investments | 2,619 | 3,563
Other Investments [Member] |  |
Noncurrent equity investments | 825 | 2,725
Common Class B [Member] | Zedge Inc [Member] |  |
Current equity investments | 217 | 649
Common Class B [Member] | Rafael Holdings Inc. [Member] |  |
Current equity investments | 624 | 12,479
Restricted Common Class B [Member] | Rafael Holdings Inc. [Member] |  |
Current equity investments |  | 2,209
Series C Convertible Preferred Stock [Member] | Visa Inc [Member] |  |
Noncurrent equity investments | 2,131 | 2,465
Series B And Series C Convertible Preferred Stock [Member] |  |
Noncurrent equity investments | $ 1,744 | $ 2,901

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