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Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Oct. 31, 2024 | Jul. 31, 2024
--- | --- | ---
Debt Securities, Available-for-Sale, Amortized Cost | $ 27,598 | $ 23,818
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 18 | 11
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (342) | (391)
Debt Securities, Available-for-Sale | 27,274 | 23,438
US Treasury Bill Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 20,568 | 16,641
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 16 | 10
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (52) | (66)
Debt Securities, Available-for-Sale | 20,532 | 16,585
US Government-sponsored Enterprises Debt Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 3,342 | 3,356
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 1 |
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax |  | (3)
Debt Securities, Available-for-Sale | 3,343 | 3,353
Corporate Bond Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 3,688 | 3,821
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 1 | 1
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (290) | (322)
Debt Securities, Available-for-Sale | $ 3,399 | $ 3,500

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