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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Dec. 31, 2015
Dec. 31, 2014
Assets    
Allowance for doubtful accounts $ 17,200 $ 86,722
Stockholders Equity    
Preferred stock par value (usd per share) $ 0.001 $ 0.001
Preferred stock shares authorized (in shares) 500,000 500,000
Preferred stock shares issued (in shares) 0 0
Preferred stock shares outstanding (in shares) 0 0
Common stock, par value (usd per share) $ 0.001 $ 0.001
Common stock shares authorized (in shares) 40,000,000 40,000,000
Common stock shares issued (in shares) 24,752,408 24,087,627
Common stock shares Outstanding (in shares) 24,375,881 23,711,100
Treasury stock (in shares) 376,527 376,527