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Note 14 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Aug. 31, 2021
Aug. 31, 2020
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%  
Foreign Withholding Tax $ 113,000 $ (76,000)
Tax Credit Carryforward, Foreign, Expirations in Period 897,000  
Deferred Tax Assets, Operating Loss Carryforwards, Domestic 1,065,500  
Deferred Tax Assets, Operating Loss Carryforwards, State and Local 377,600  
Deferred Tax Assets, Operating Loss Carryforwards, Foreign 247,500  
Tax Credit Carryforward, Valuation Allowance 11,447,500 11,561,700
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 114,000 2,797,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total 0 0
Foreign Tax Authority [Member]    
Tax Credit Carryforward, Amount 4,893,300 $ 5,790,500
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration 223,300  
Federal and State Tax [Member]    
Tax Credit Carryforward, Amount $ 3,552,500