Registration of securities issued in business combination transactions

Common Stock - Summary of Outstanding Warrants (Parenthetical) (Detail)

v3.7.0.1
Common Stock - Summary of Outstanding Warrants (Parenthetical) (Detail)
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Series A Warrants [Member]    
Class of Warrant or Right [Line Items]    
Warrants issued date 2014-07 2014-07
Series B Warrants [Member]    
Class of Warrant or Right [Line Items]    
Warrants issued date 2014-07 2014-07
Series A-1 Warrants [Member]    
Class of Warrant or Right [Line Items]    
Warrants issued date 2015-04 2015-04