Annual report pursuant to Section 13 and 15(d)

Common Stock and Net Loss per Common Share - Schedule of the computation of historical basic and diluted net loss per share (Details)

v3.8.0.1
Common Stock and Net Loss per Common Share - Schedule of the computation of historical basic and diluted net loss per share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Numerator                      
Net loss $ (44,749) $ (66,243) $ (275,136) $ (132,267) $ (90,009) $ (61,534) $ (76,333) $ (115,102) $ (518,395) $ (342,978) $ (169,661)
Less: Stock dividend payable and transaction costs                 40,166 0 0
Net loss available to common stockholders $ (52,068) $ (84,562) $ (289,664) $ (132,267) $ (90,009) $ (61,534) $ (76,333) $ (115,102) $ (558,561) $ (342,978) $ (169,661)
Denominator                      
Weighted-average common shares outstanding used in computing basic and diluted net loss per common share (in shares)                 243,637 230,693 213,790
Net loss per common share, basic and diluted (in dollars per share) $ (0.21) $ (0.34) $ (1.20) $ (0.56) $ (0.38) $ (0.27) $ (0.33) $ (0.51) $ (2.29) $ (1.49) $ (0.79)