Quarterly report pursuant to Section 13 or 15(d)

Unaudited Condensed Balance Sheets (Parenthetical)

v3.10.0.1
Unaudited Condensed Balance Sheets (Parenthetical) - $ / shares
Sep. 30, 2018
Dec. 31, 2017
Statement Of Financial Position [Abstract]    
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000 5,000,000
Preferred stock, shares issued (in shares) 0 0
Preferred stock, shares outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 125,000,000 125,000,000
Common stock, shares issued (in shares) 47,193,062 28,971,651
Common stock, shares outstanding (in shares) 47,193,062 28,971,651