Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Balance Sheets (Parenthetical)

v3.7.0.1
Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares
Jun. 30, 2017
Dec. 31, 2016
Statement Of Financial Position [Abstract]    
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 160,000,000 160,000,000
Common stock, shares issued 83,479,539 70,871,902
Common stock, shares outstanding 83,479,539 70,871,902