Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.19.2
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2019
Dec. 31, 2018
Statement Of Financial Position [Abstract]    
Preferred stock, par value $ 0.0001 $ 0.0001
Preferred stock, shares authorized 10,000,000 10,000,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.0001 $ 0.0001
Common stock, shares authorized 100,000,000 100,000,000
Common stock, shares issued 68,701,043 59,456,493
Common stock, shares outstanding 68,701,043 59,456,493