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Debt Securities (Tables) | 12 Months Ended
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Jul. 31, 2024
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
(in thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
July 31, 2024 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 16,641 |  |  | $ | 10 |  |  | $ | (66 | ) |  | $ | 16,585 |
Government sponsored enterprise notes |  |  | 3,356 |  |  |  | — |  |  |  | (3 | ) |  |  | 3,353 |
Corporate bonds |  |  | 3,821 |  |  |  | 1 |  |  |  | (322 | ) |  |  | 3,500 |
TOTAL |  | $ | 23,818 |  |  | $ | 11 |  |  | $ | (391 | ) |  | $ | 23,438 |
July 31, 2023 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit* |  | $ | 4,080 |  |  | $ | — |  |  | $ | (4 | ) |  | $ | 4,076 |
U.S. Treasury bills and notes |  |  | 31,186 |  |  |  | — |  |  |  | (148 | ) |  |  | 31,038 |
Corporate bonds |  |  | 3,881 |  |  |  | — |  |  |  | (8 | ) |  |  | 3,873 |
Municipal bonds |  |  | 3,912 |  |  |  | — |  |  |  | (485 | ) |  |  | 3,427 |
TOTAL |  | $ | 43,059 |  |  | $ | — |  |  | $ | (645 | ) |  | $ | 42,414 |
* | Each of the certificates of deposit held by the Company has a CUSIP, was purchased in the secondary market through a broker and may be sold in the secondary market.
Schedule of Contractual Maturities of Available-for-sale Debt Securities | The contractual maturities of the Company’s available-for-sale debt securities at July 31, 2024 were as follows: Schedule of Contractual Maturities of Available-for-sale Debt Securities
(in thousands) |  | Fair Value |
Within one year |  | $ | 16,808 |
After one year through five years |  |  | 5,456 |
After five years through ten years |  |  | 1,137 |
After ten years |  |  | 37 |
TOTAL |  | $ | 23,438 |
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
(in thousands) |  | Unrealized Losses |  |  | Fair Value |
July 31, 2024 |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 66 |  |  | $ | 12,936 |
Government sponsored enterprise notes |  |  | 3 |  |  |  | 2,634 |
Corporate bonds |  |  | 322 |  |  |  | 3,310 |
TOTAL |  | $ | 391 |  |  | $ | 18,880 |
July 31, 2023 |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 4 |  |  | $ | 3,356 |
U.S. Treasury bills and notes |  |  | 148 |  |  |  | 31,038 |
Corporate bonds |  |  | 8 |  |  |  | 3,873 |
Municipal bonds |  |  | 485 |  |  |  | 3,368 |
TOTAL |  | $ | 645 |  |  | $ | 41,635 |
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
(in thousands) |  | Unrealized Losses |  |  | Fair Value |
July 31, 2024 |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 60 |  |  | $ | 4,827 |
Corporate bonds |  |  | 307 |  |  |  | 3,209 |
TOTAL |  | $ | 367 |  |  | $ | 8,036 |
July 31, 2023 |  |  |  |  |  |  |  |
U.S. Treasury bills and notes |  | $ | 86 |  |  | $ | 816 |
Corporate bonds |  |  | 484 |  |  |  | 3,299 |
TOTAL |  | $ | 570 |  |  | $ | 4,115 |

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