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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowances on accounts receivable $ 251,456 $ 354,542
Accumulated depreciation $ 18,137,451 $ 17,926,959
Series A Redeemable convertible preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Series A Redeemable convertible preferred stock, shares authorized (in shares) 2,000,000 2,000,000
Series A Redeemable convertible preferred stock, shares issued (in shares) 900,000 900,000
Series A Redeemable convertible preferred stock, shares outstanding (in shares) 900,000 900,000
Series A redeemable convertible preferred stock, redemption value $ 10,831,863 $ 9,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 800,000,000 100,000,000
Common stock, shares issued (in shares) 97,937,491 60,091,560
Common stock, shares outstanding (in shares) 97,937,491 44,563,490
Common Stock held in treasury, shares (in shares) 0 15,528,070