Note 8 - Equity Investments - Equity Securities Without Readily Determined Fair Value (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Jul. 31, 2026 |
Jul. 31, 2025 |
Jul. 31, 2024 |
|
| Balance | $ 1,171 | $ 964 | $ 1,632 |
| Adjustment for observable transactions involving a similar investment from the same issuer | (519) | 207 | 309 |
| Redemption for Visa Series C Preferred mandatory release assessment | 695 | 0 | 0 |
| Upward adjustment | 0 | 0 | 130 |
| Redemptions | 0 | 0 | (230) |
| Impairments | 0 | 0 | 0 |
| BALANCE, END OF PERIOD | 1,347 | 1,171 | 964 |
| Preferred Stock [Member] | |||
| Redemption for Visa Series C Preferred mandatory release assessment | $ 0 | $ 0 | $ (877) |
| X | ||||||||||
- Definition The amount of adjustments for the observable transactions involving similar investments from the same issuer in equity security without readily determinable fair value. No definition available.
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| X | ||||||||||
- Definition Amount of redemption value for mandatory release assessments on investment in equity security without readily determinable fair value. No definition available.
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| X | ||||||||||
- Definition Amount of redemption value on investment in equity security without readily determinable fair value. No definition available.
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| X | ||||||||||
- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of impairment loss on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount of gain from upward price adjustment on investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Details
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