XML 106 R89.htm IDEA: XBRL DOCUMENT v3.4.0.3
Employee Benefit Plan - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Compensation and Retirement Disclosure [Abstract]      
Defined contribution saving plan, vesting period 5 years    
Defined contribution saving plan cost $ 0.8 $ 0.6 $ 0.6