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Note 11 - Stock-Based Compensation (Details) (USD $)
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 10 years  
Stock or Unit Option Plan Expense (in Dollars) $ 454,015 $ 306,451
Allocated Share-based Compensation Expense, Estimate, Next Fiscal Year (in Dollars) 207,331  
Estimated Forfeiture Rate For Stock Options 10.00%  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 8.57 $ 5.53
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term 5 years 335 days 4 years 189 days
Employee Stock Option [Member] | Minimum [Member] | 2007 Plan [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years  
Employee Stock Option [Member] | Maximum [Member] | 2007 Plan [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 4 years  
Employee Stock Option [Member] | 2007 Plan [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term 10 years  
Employee Stock Option [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Stock or Unit Option Plan Expense (in Dollars) 454,015 306,451
Net of Estimated Forfeitures [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options (in Dollars) $ 286,584  
Minimum [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   5 years
Maximum [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term   10 years
2007 Plan [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)   800,000
ESPP [Member]
   
Note 11 - Stock-Based Compensation (Details) [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) 100,000  
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date 90.00%