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Schedule of Assets Measured at Fair Value on a Recurring Basis Using Significant Unobservable Inputs (Level 3) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020
Fair Value Disclosures [Abstract] |  |  |
Balance, beginning of period | $ 2,465 | $ 3,825 | $ 3,619
Purchase of Rafael Holdings, Inc. warrant |  | 354 |
Exercise of Rafael Holdings, Inc. warrant |  | (380) |
Redemption for Visa mandatory release assessment | (1,230) | (1,870) |
Total (losses) gains included in “Other (expense) income, net” | (103) | 536 | 206
BALANCE, END OF PERIOD | 1,132 | 2,465 | 3,825
Change in unrealized gains or losses for the period included in earnings for assets held at the end of the period |  |  |

X
- Definition Amount of change in unrealized gains or losses included in earnings for assets held at end of period. + References No definition available. + Details
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X
- Definition Exercise of rafael holdings inc warrant. + References No definition available. + Details
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Balance Type: | debit
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X
- Definition Purchase of Rafael Holdings Inc warrant. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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X
- Definition Redemption for Visa mandatory release assessment + References No definition available. + Details
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Balance Type: | debit
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- Definition Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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- Definition Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126976982&loc=d3e19207-110258 + Details
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