Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
Assets    
Allowance for doubtful accounts $ 209,667 $ 225,000
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) 100,000,000 100,000,000
Common stock shares issued (in shares) 98,035,829 98,035,829
Common stock shares outstanding (in shares) 52,222,538 51,846,011
Treasury stock (in shares) 0 376,527