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Consolidated Balance Sheets (Parentheticals) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Allowance for doubtful accounts (in Dollars) $ 122,095 $ 125,766
Preferred stock, shares authorized 1,250,000 1,250,000
Preferred stock - shares issued 0 0
Preferred stock - shares outstanding 0 0
Preferred stock - no par value (in Dollars per share) $ 0 $ 0
Common stock shares authorized 250,000,000 250,000,000
Common stock shares issued 10,685,599 11,329,732
Common stock shares outstanding 10,685,599 11,329,732
Common stock - no par value (in Dollars per share) $ 0 $ 0