Annual report [Section 13 and 15(d), not S-K Item 405]

INCOME TAXES (Details)

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INCOME TAXES (Details) - USD ($)
12 Months Ended
Aug. 31, 2025
Aug. 31, 2024
Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Current income tax expense $ 4,200,000 $ 4,000,000
Deferred income tax expense 100,000  
Unrecognized tax benefits 0 0
Income Taxes Paid, Net [Abstract]    
Income Tax Paid, Federal, after Refund Received 3,600,000 1,600,000
Income Tax Paid, State and Local, after Refund Received 800,000 500,000
Deferred Tax Assets (Liabilities) [Abstract]    
Depreciation and depletion (2,361,000) (2,237,000)
Non-qualified stock options 522,000 527,000
Accrued compensation 127,000 230,000
Deferred revenue 113,000 31,000
Other 58,000 54,000
Net deferred tax liability (1,541,000) (1,395,000)
Effective Income Tax Rate Reconciliation [Abstract]    
Expected expense (benefit) from federal taxes at statutory rate of 21% 3,669,000 3,283,000
State taxes, net of federal benefit 600,000 559,000
Permanent and other differences 45,000 148,000
Stock Compensation (12,000) (14,000)
Other 58,000 43,000
Total income tax expense $ 4,360,000 $ 4,019,000
Statutory federal tax rate 21.00% 21.00%
Net Operating Loss Carryforwards [Abstract]    
Net operating loss carryforwards $ 0 $ 0
Maximum    
Income Tax Expense (Benefit), Continuing Operations [Abstract]    
Deferred income tax expense   $ 100,000