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Note 11 - Stock-Based Compensation (Tables)
12 Months Ended
Aug. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
   
August 31, 2014
   
August 31, 2013
Dividend yield
    0.00 %       0.00%  
Expected volatility
    47.4 %       48.0%  
Expected life of option (years)
    10       5 - 10
Weighted average risk-free interest rate
    1.39 %       0.71%  
Schedule of Share-based Compensation, Stock Options, Activity [Table Text Block]
   
Number of
Shares (#)
   
Weighted Average
Exercise Price
   
Aggregate
Intrinsic Value
 
Outstanding at August 31, 2012
    203,873     $ 10.01        
Options granted
    118,294       10.25          
Options exercised
    (37,040 )     9.96          
Options terminated
    (24,500 )     13.12          
                         
Outstanding at August 31, 2013
    260,627     $ 9.84          
Options granted
    56,373       14.83          
Options exercised
    (74,000 )     7.82          
Options terminated
    (4,000 )     8.57          
                         
Outstanding at August 31, 2014
    239,000     $ 11.66     $ 2,163,147  
                         
Exercisable at August 31, 2014
    136,731     $ 10.83     $ 1,351,499