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Schedule of Continuous Unrealized Loss Position for 12 Months or Longer (Details) - USD ($) $ in Thousands | Apr. 30, 2025 | Jul. 31, 2024
--- | --- | ---
Unrealized Losses | $ 234 | $ 367
Fair Value | 3,255 | 8,036
US Treasury Bill Securities [Member] |  |
Unrealized Losses | 16 | 60
Fair Value | 271 | 4,827
Corporate Bond Securities [Member] |  |
Unrealized Losses | 218 | 307
Fair Value | $ 2,984 | $ 3,209

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