Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Assets    
Allowance for doubtful accounts $ 43,727 $ 83,789
Stockholders Equity    
Preferred stock par value (in 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 (in 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) 32,810,202 28,994,981
Common stock shares outstanding (in shares) 32,433,675 28,618,454
Treasury stock (in shares) 376,527 376,527