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Note 19 - Quaterly Information (Unaudited) (Details) - Quater Information (Unaudited) (USD $)
 3 Months Ended 12 Months Ended
Aug. 31, 2013
May 31, 2013
Feb. 28, 2013
Nov. 30, 2012
Aug. 31, 2012
May 31, 2012
Feb. 29, 2012
Nov. 30, 2011
Aug. 31, 2013
Aug. 31, 2012
Fiscal year 2012:                    
Net sales         $ 5,170,307 $ 7,804,904 $ 4,974,328 $ 4,832,114    
Gross profit 1,992,771 1,822,669 1,612,437 1,600,775 1,474,594 3,661,390 1,494,246 1,622,638 7,028,652 8,252,868
Income before income tax expense 2,294,041 1,445,769 985,155 892,536 416,611 2,454,623 703,991 1,041,421 5,617,501 4,616,646
Income tax expense (benefit) 332,000 158,000 240,000 134,000 (32,000) 814,000 100,000 106,000 864,000 1,041,000
Net income $ 1,962,041 $ 1,287,769 $ 745,155 $ 758,536 $ 448,611 $ 1,640,623 $ 603,991 $ 935,421 $ 4,753,501 $ 3,575,646
Net income per share:                    
Basic (in Dollars per share) $ 0.37 $ 0.21 $ 0.10 $ 0.09 $ 0.10 $ 0.33 $ 0.14 $ 0.22 $ 0.76 $ 0.79
Diluted (in Dollars per share) $ 0.36 $ 0.21 $ 0.10 $ 0.09 $ 0.10 $ 0.33 $ 0.14 $ 0.22 $ 0.75 $ 0.78
Weighted average common shares assumed outstanding:                    
Basic (in Shares) 4,431,948 4,421,379 4,418,821 4,406,205 4,403,656 4,399,290 4,398,356 4,355,666    
Diluted (in Shares) 4,501,017 4,468,861 4,485,076 4,440,436 4,436,444 4,461,044 4,466,435 4,433,724 4,475,895 4,451,594