Annual report pursuant to Section 13 and 15(d)

LOSS PER SHARE - Schedule of Earnings Per Share, Basic and Diluted (Detail)

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LOSS PER SHARE - Schedule of Earnings Per Share, Basic and Diluted (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Earnings Per Share [Abstract]                      
Net loss $ (37,541) $ (39,607) $ (40,493) $ (34,126) $ (31,516) $ (33,191) $ (35,854) $ (25,184) $ (151,767) $ (125,745) $ (231,459)
Basic and diluted weighted average common shares outstanding (in shares) 218,819 218,780 218,742 217,838 217,408 217,380 206,531 204,772 218,548 211,574 188,536
Loss per share:                      
Basic and diluted (in dollars per share) $ (0.17) $ (0.18) $ (0.19) $ (0.16) $ (0.14) $ (0.15) $ (0.17) $ (0.12) $ (0.69) $ (0.59) $ (1.23)