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Note 14 - Income Taxes (Details Textual) - USD ($)
 2 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2018
Aug. 31, 2018
Aug. 31, 2018
Aug. 31, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     25.70%  
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability $ 700,000   $ 632,523  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ (700,000)      
Provisional Adjustments Related to Transition of Tax on Deemed Repatriation of Accumulated Foreign Income     489,000  
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount   $ (67,477) $ 633,000
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent     7.80%  
Repatriation of Foreign Earnings, Tax     $ 604,000  
Income Tax Expense Increase (Decrease) Deemed Repatriation, Net     0  
Foreign Withholding Tax     79,000 3,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total   0 0 0
Foreign Tax Authority [Member]        
Tax Credit Carryforward, Valuation Allowance   5,789,600 5,789,600 6,105,700
Operating Loss Carryforwards, Valuation Allowance, Total   376,100 376,100 618,000
Federal and State Tax [Member]        
Tax Credit Carryforward, Valuation Allowance   2,865,000 2,865,000 $ 2,855,100
Operating Loss Carryforwards, Total   $ 2,864,900 $ 2,864,900