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Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Statement Of Financial Position [Abstract]    
Inventory net allowance $ 39,403 $ 39,403
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 28,707,047 28,585,449
Common stock, shares outstanding 28,707,047 28,585,449