Quarterly report pursuant to Section 13 or 15(d)

CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Mar. 31, 2021
Dec. 31, 2020
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 191,667 $ 209,667
Preferred stock, par or stated value per share (in dollars 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 or stated value per share (in dollars per share) $ 0.001 $ 0.001
Common stock shares authorized (in shares) 150,000,000 100,000,000
Common stock shares issued (in shares) 118,518,445 98,035,829
Common stock shares outstanding (in shares) 118,518,445 98,035,829