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Condensed Balance Sheets (Parenthetical) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Inventory net allowance $ 207,880 $ 270,307
Common stock, par value $ 0.001 $ 0.001
Common stock, shares authorized 200,000,000 200,000,000
Common stock, shares issued 11,358,324 7,939,967
Common stock, shares outstanding 11,358,324 7,938,571
Treasury stock, shares 0 1,396