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Note 9 - Stockholders' Equity (Details) - Exercised Stock Options (USD $)
 12 Months Ended
Aug. 31, 2013
Aug. 31, 2012
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 37,040 3,966
Exercise Price (in Dollars per share) $ 9.96 $ 8.71
Exercise 1 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 25,140  
Exercise Price (in Dollars per share) $ 9.95  
Exercise 6 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 4,000  
Exercise Price (in Dollars per share) $ 12.84  
Exercise 2 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 4,000  
Exercise Price (in Dollars per share) $ 8.57  
Exercise 3 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 1,734  
Exercise Price (in Dollars per share) $ 7.65  
Exercise 4 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 1,500  
Exercise Price (in Dollars per share) $ 9.76  
Exercise 5 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised 666  
Exercise Price (in Dollars per share) $ 7.75  
Excercise 1 FY12 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised   1,966
Exercise Price (in Dollars per share)   $ 7.65
Exercise 2 FY12 [Member]
    
Note 9 - Stockholders' Equity (Details) - Exercised Stock Options [Line Items]    
Options Exercised   2,000
Exercise Price (in Dollars per share)   $ 9.75