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Significant Components of Deferred Income Taxes (Details) - USD ($) $ in Thousands | Jul. 31, 2023 | Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2020
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Income Tax Disclosure [Abstract] |  |  |  |
Bad debt reserve | $ 1,117 | $ 959 |  |
Accrued expenses | 4,825 | 3,570 |  |
Stock options and restricted stock | 361 | 42 |  |
Charitable contributions | 724 | 730 |  |
Depreciation | (585) | (640) |  |
Unrealized gain | 4,407 | 2,895 |  |
Net operating loss | 23,870 | 40,733 |  |
Total deferred income tax assets | 34,719 | 48,289 |  |
Valuation allowance | (10,618) | (11,588) | $ (11,540) | $ (58,700)
NET DEFERRED INCOME TAX ASSETS | $ 24,101 | $ 36,701 |  |

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