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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts $ 37,821 $ 42,006
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 25,000,000 25,000,000
Common stock, shares issued 6,888,679 6,881,794
Common stock, shares outstanding 6,888,679 6,881,794