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Schedule of Available-for-sale Securities (Details) - USD ($) $ in Thousands | Jul. 31, 2025 | Jul. 31, 2024
--- | --- | ---
Debt Securities, Available-for-Sale, Amortized Cost | $ 21,874 | $ 23,818
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 2 | 11
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (227) | (391)
Debt Securities, Available-for-Sale | 21,649 | 23,438
US Treasury Bill Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 12,953 | 16,641
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |  | 10
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (27) | (66)
Debt Securities, Available-for-Sale | 12,926 | 16,585
US Government-sponsored Enterprises Debt Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 5,554 | 3,356
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax |  |
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (4) | (3)
Debt Securities, Available-for-Sale | 5,550 | 3,353
Corporate Bond Securities [Member] |  |
Debt Securities, Available-for-Sale, Amortized Cost | 3,367 | 3,821
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax | 2 | 1
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax | (196) | (322)
Debt Securities, Available-for-Sale | $ 3,173 | $ 3,500

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