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Schedule of Unrealized (losses) Gains for All Equity Investments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Oct. 31, 2023 | Oct. 31, 2022
Net losses recognized during the period on equity investments | $ (917) | $ (1,941)
Plus: net losses recognized during the period on equity investments sold during the period |  | 4
Unrealized losses recognized during the period on equity investments still held at the reporting date | (917) | (1,937)
Rafael Class B Common Stock [Member] |  |
Unrealized losses recognized during the period on equity investments still held at the reporting date | (62) | (72)
Zedge Class B Common Stock [Member] |  |
Unrealized losses recognized during the period on equity investments still held at the reporting date | $ (8) | $ (27)

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- Definition Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-4 + Details
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- Definition Amount of unrealized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147483586/944-220-S99-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 321 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479536/321-10-50-4 + Details
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