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Consolidated Balance Sheets (Parentheticals) - USD ($)
Aug. 31, 2015
Aug. 31, 2014
Trade excluding joint ventures, allowance for doubtful accounts $ 40,000 $ 40,000
Preferred stock, par value (in dollars per share) $ 0 $ 0
Preferred stock, shares authorized (in shares) 10,000 10,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock par value (in dollars per share) $ 0.02 $ 0.02
Common stock, shares authorized (in shares) 10,000,000 10,000,000
Common stock, shares issued (in shares) 4,539,045 4,504,552
Common stock, shares outstanding (in shares) 4,539,045 4,504,552