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INCOME TAXES (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Nov. 30, 2020 | Nov. 30, 2019 | Aug. 31, 2020
INCOME TAXES [Abstract] |  |  |
Income tax expense | $ 260 | $ 1,887 |
Current income tax expense | 200 | 1,200 |
Deferred income tax expense | $ 126 | $ 719 |
Estimated annual effective tax rate | 25.00% |  |
Effective tax rate | 24.60% | 24.70% |
Income taxes paid | $ 0 | $ 0 |
Deferred Tax Assets (Liabilities) [Abstract] |  |  |
Net operating loss carryforwards | 0 |  | $ 23
Accrued compensation | 33 |  | 167
Deferred revenues | 76 |  | 89
Depreciation and depletion | (1,672) |  | (1,701)
Non-qualified stock options | 505 |  | 491
Other | 46 |  | 45
Net deferred tax liability | $ (1,012) |  | $ (886)

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