Annual report pursuant to Section 13 and 15(d)

Employee Benefit Plan - Additional Information (Detail)

v3.3.1.900
Employee Benefit Plan - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Benefit Plan Disclosure [Line Items]      
Employee contribution percentage 4.00%    
Employer matching contribution $ 118,000 $ 83,000 $ 107,000