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Schedule of Equity Investments (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 30, 2021 | Jul. 31, 2020
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | $ 37,586 | $ 5,964
Noncurrent equity investments | 14,922 | 8,833
Other Marketable Equity Securities [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | 1,956 |
Mutual Fund [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | 23,070 | 5,516
Hedge Funds [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Noncurrent equity investments | 3,462 | 4,783
Other Investments [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Noncurrent equity investments | 2,725 | 225
Common Class B [Member] | Zedge Inc [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | $ 562 | $ 59
Number of related party shares received | 42,282 | 42,282
Common Class B [Member] | Rafael Holdings Inc. [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | $ 1,171 | $ 389
Number of related party shares received | 28,320 | 27,806
Restricted Common Class B [Member] | Rafael Holdings Inc. [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Current equity investments | $ 10,827 |
Number of related party shares received | 261,894 |
Series C Preferred Stock [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Noncurrent equity investments | $ 2,343 | 3,825
Series A Preferred Stock [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Noncurrent equity investments | 2,920 |
Series B Convertible Preferred Stock [Member] |  |
EquityInvestmentsDetailsScheduleOfEquityInvestmentsLineItemsLineItems [Line Items] |  |
Noncurrent equity investments | $ 3,472 |

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