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Debt Securities (Tables) | 3 Months Ended
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Oct. 31, 2025
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities | The following is a summary of available-for-sale debt securities: Schedule of Available-for-sale Securities
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
October 31, 2025: |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 15,876 |  |  | $ | — |  |  | $ | (21 | ) |  | $ | 15,855 |
Government sponsored enterprise notes |  |  | 6,218 |  |  |  | 2 |  |  |  | (1 | ) |  |  | 6,219 |
Corporate bonds |  |  | 3,263 |  |  |  | 5 |  |  |  | (156 | ) |  |  | 3,112 |
Total |  | $ | 25,357 |  |  | $ | 7 |  |  | $ | (178 | ) |  | $ | 25,186 |
July 31, 2025: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 12,953 |  |  | $ | — |  |  | $ | (27 | ) |  | $ | 12,926 |
Government sponsored enterprise notes |  |  | 5,554 |  |  |  | — |  |  |  | (4 | ) |  |  | 5,550 |
Corporate bonds |  |  | 3,367 |  |  |  | 2 |  |  |  | (196 | ) |  |  | 3,173 |
Total |  | $ | 21,874 |  |  | $ | 2 |  |  | $ | (227 | ) |  | $ | 21,649 |
Schedule of Contractual Maturities of Available-for-sale Debt Securities | The contractual maturities of the Company’s available-for-sale debt securities at October 31, 2025 were as follows: Schedule of Contractual Maturities of Available-for-sale Debt Securities
|  | Fair Value |
|  | (in thousands) |
Within one year |  | $ | 22,553 |
After one year through five years |  |  | 2,312 |
After five years through ten years |  |  | 310 |
After ten years |  |  | 11 |
Total |  | $ | 25,186 |
Schedule of Available-for-sale Securities, Unrealized Loss Position | The following table includes the fair value of the Company’s available-for-sale debt securities that were in an unrealized loss position: Schedule of Available-for-sale Securities, Unrealized Loss Position
|  | Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
October 31, 2025: |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 21 |  |  | $ | 15,505 |
Government sponsored enterprise notes |  |  | 1 |  |  |  | 2,702 |
Corporate bonds |  |  | 156 |  |  |  | 2,890 |
Total |  | $ | 178 |  |  | $ | 21,097 |
July 31, 2025: |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 27 |  |  | $ | 12,926 |
Government sponsored enterprise notes |  |  | 4 |  |  |  | 5,550 |
Corporate bonds |  |  | 196 |  |  |  | 2,976 |
Total |  | $ | 227 |  |  | $ | 21,452 |
Schedule of Continuous Unrealized Loss Position for 12 Months or Longer | The following available-for-sale debt securities included in the table above were in a continuous unrealized loss position for 12 months or longer: Schedule of Continuous Unrealized Loss Position for 12 Months or Longer
|  | Unrealized Losses |  |  | Fair Value |
|  | (in thousands) |
October 31, 2025: |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 15 |  |  | $ | 333 |
Corporate bonds |  |  | 156 |  |  |  | 2,822 |
Total |  | $ | 171 |  |  | $ | 3,155 |
July 31, 2025: |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 19 |  |  | $ | 329 |
Corporate bonds |  |  | 195 |  |  |  | 2,967 |
Total |  | $ | 214 |  |  | $ | 3,296 |

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