Annual report pursuant to Section 13 and 15(d)

Consolidated Balance Sheets (Parenthetical)

v3.20.1
Consolidated Balance Sheets (Parenthetical) - $ / shares
Dec. 31, 2019
Jun. 18, 2019
Jun. 17, 2019
Dec. 31, 2018
May 07, 2014
Statement Of Financial Position [Abstract]          
Preferred stock, par value (in dollars per share) $ 0.001     $ 0.001 $ 0.001
Preferred stock, shares authorized (in shares) 5,000,000     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) 250,000,000 250,000,000 125,000,000 125,000,000  
Common stock, shares issued (in shares) 97,413,721     47,971,989  
Common stock, shares outstanding (in shares) 97,413,721     47,971,989