Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Additional Information 2 (Detail)

v3.7.0.1
Common Stock - Additional Information 2 (Detail) - shares
shares in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Anti-dilutive securities excluded from earning per share computation 5.2 7.2
Warrant [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Anti-dilutive securities excluded from earning per share computation 3.7  
Stock Options [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Anti-dilutive securities excluded from earning per share computation 1.3  
Restricted Stock Unit [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Anti-dilutive securities excluded from earning per share computation 0.1