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Note 4 - Long-term Debt (Details Textual) - USD ($)
Sep. 06, 2002
Aug. 31, 2016
Debt Instrument, Periodic Payment $ 35,000  
Debt Instrument, Interest Rate, Stated Percentage 4.75%  
Debt Instrument, Term 15 years  
Debt Instrument, Face Amount $ 386,000  
Stock Repurchased and Retired During Period, Shares 1,380,040  
Notes Payable, Noncurrent   $ 33,413