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Note 1 - Nature of Business and Significant Accounting Policies (Tables)
12 Months Ended
Aug. 31, 2015
Notes Tables  
Allowance for Credit Losses on Financing Receivables [Table Text Block]
August 31, 2012   $ 20,000  
Bad debts     21,000  
Adjustment to provision     (21,000 )
August 31, 2013   $ 20,000  
Bad debts     107,000  
Adjustment to provision     (87,000 )
August 31, 2014     40,000  
Bad debts     6,000  
Adjustment to provision     (6,000 )
August 31, 2015   $ 40,000  
Property and Equipment Useful Life [Table Text Block]
Buildings and improvements (years)   5 - 30  
Machinery and equipment (years)   3 - 10