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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, 2022 | Oct. 31, 2021
Net losses recognized during the period on equity investments | $ (1,941) | $ (14,494)
Plus: net losses recognized during the period on equity investments redeemed during the period | 4 |
Unrealized losses recognized during the period on equity investments still held at the reporting date | (1,937) | (14,494)
Rafael Class B Common Stock [Member] |  |
Unrealized losses recognized during the period on equity investments still held at the reporting date | (72) | (12,494)
Zedge Class B Common Stock [Member] |  |
Unrealized losses recognized during the period on equity investments still held at the reporting date | $ (27) | $ (162)

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- Definition Amount of recognized unrealized gain (loss) net on equity securities redeemed (FV-NI). + References No definition available. + Details
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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117546-209714 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(d)) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126980263&loc=SL75117546-209714 + Details
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- Details
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