Condensed Balance Sheets (Parenthetical) - USD ($)	Sep. 30, 2018	Dec. 31, 2017
Statement Of Financial Position [Abstract]
Inventory net allowance	$ 39,403	$ 62,142
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	200,000,000	200,000,000
Common stock, shares issued	28,479,341	13,929,763
Common stock, shares outstanding	28,479,341	13,929,763