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Income Taxes (Details) - Schedule of deferred income tax assets - USD ($) $ in Thousands | Jul. 31, 2020 | Jul. 31, 2019 | Jul. 31, 2018
--- | --- | --- | ---
Deferred income tax assets: |  |  |
Bad debt reserve | $ 854 | $ 540 |
Accrued expenses | 2,963 | 3,134 |
Stock options and restricted stock | 1,226 | 866 |
Charitable contributions | 659 | 734 |
Depreciation | (71) | 151 |
Unrealized gain | (302) | (231) |
Net operating loss | 62,588 | 72,625 |
Transaction taxes |  | 2,000 |
Deferred revenue | (705) | (1,060) |
Total deferred income tax assets | 67,212 | 78,759 |
Valuation allowance | (58,700) | (74,170) | $ (76,020)
NET DEFERRED INCOME TAX ASSETS | $ 8,512 | $ 4,589 |

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