Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Fair value of derivative warrant liability (Detail)

v3.3.1.900
Fair Value Measurements - Fair value of derivative warrant liability (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair value adjustment of derivative warrant liability $ 438 $ 0 $ 0
Warrant [Member]      
Beginning balance at January 1, 2015 0    
Recognition of derivative warrant liability 114    
Fair value adjustment of derivative warrant liability 0    
Ending balance at December 31, 2015 $ 114 $ 0