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Investments in Marketable Securities (Tables) | 12 Months Ended
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Jul. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of fair value for available-for-sale securities |
July 31, 2022 |  | Amortized cost |  |  | Gross unrealized gains |  |  | Gross unrealized (losses) |  |  | Fair value |
|  | (in thousands) |
Available-for-sale securities: |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | 36,761 |  |  | $ | 81 |  |  | $ | (144 | ) |  | $ | 36,698 |
Total available-for-sale securities |  | $ | 36,761 |  |  | $ | 81 |  |  | $ | (144 | ) |  | $ | 36,698 |

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- Definition Tabular disclosure of the reconciliation of available-for-sale securities from cost basis to fair value. + References No definition available. + Details
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