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Schedule of Available-for-sale Securities, Unrealized Loss Position (Details) - USD ($) $ in Thousands | Jan. 31, 2025 | Jul. 31, 2024
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Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | $ 321 | $ 391
Debt Securities, Available-for-Sale, Unrealized Loss Position | 10,171 | 18,880
US Treasury Bill Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 42 | 66
Debt Securities, Available-for-Sale, Unrealized Loss Position | 5,309 | 12,936
Government Sponsored Enterprise Notes [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 1 | 3
Debt Securities, Available-for-Sale, Unrealized Loss Position | 1,567 | 2,634
Corporate Bond Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss | 278 | 322
Debt Securities, Available-for-Sale, Unrealized Loss Position | $ 3,295 | $ 3,310

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