Quarterly report pursuant to Section 13 or 15(d)

CONDENSED BALANCE SHEETS (Parenthetical)

v3.19.2
CONDENSED BALANCE SHEETS (Parenthetical) - $ / shares
Jun. 30, 2019
Dec. 31, 2018
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 outstanding (in shares) 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 675,000,000 675,000,000
Common stock, shares outstanding (in shares) 389,435,991 378,333,070