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Note 17 - Income Taxes (Details Textual) - USD ($)
 12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Aug. 31, 2013
Deferred Tax Expenses Related to Undistributed Earnings of Foreign Joint Ventures [Member]      
Deferred Income Tax Expense (Benefit) $ 79,000    
Foreign Tax Authority [Member]      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 187,400    
Tax Credit Carryforward, Valuation Allowance 4,654,800 $ 4,141,100  
Federal and State Tax [Member]      
Operating Loss Carryforwards 2,235,200    
Tax Credit Carryforward, Valuation Allowance 2,335,100 1,919,800  
Capital Loss Carryforward [Member]      
Deferred Tax Assets, Capital Loss Carryforwards 26,800    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued 0 0  
Undistributed Earnings of Foreign Subsidiaries 18,483,377 20,540,523 $ 22,281,510
Deferred Income Tax Expense (Benefit) 144,000 (95,000) $ 125,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign $ 4,654,800 4,141,100  
Deferred Tax Assets, Capital Loss Carryforwards $ 50,900