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Schedule of Available-for-sale Securities, Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jul. 31, 2025 | Jul. 31, 2024
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Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $ 227 | $ 391
Debt Securities, Available-for-Sale, Unrealized Loss Position | 21,452 | 18,880
US Treasury Bill Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 27 | 66
Debt Securities, Available-for-Sale, Unrealized Loss Position | 12,926 | 12,936
Government Sponsored Enterprise Notes [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 4 | 3
Debt Securities, Available-for-Sale, Unrealized Loss Position | 5,550 | 2,634
Corporate Bond Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 196 | 322
Debt Securities, Available-for-Sale, Unrealized Loss Position | $ 2,976 | $ 3,310

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