Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share - Additional Information (Detail)

v3.7.0.1
Net Loss Per Share - Additional Information (Detail) - shares
shares in Millions
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive securities excluded from computation of earnings per share amount 18.3 2.0