Annual report pursuant to Section 13 and 15(d)

Classification of Compensation Expense Associated with Share-Based Payments (Detail)

v3.3.1.900
Classification of Compensation Expense Associated with Share-Based Payments (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Allocated Share-based Compensation Expense $ 3,350 $ 1,233 $ 1,609
Cost Of Revenue      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Allocated Share-based Compensation Expense 333 134 288
Sales and Marketing      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Allocated Share-based Compensation Expense 679 401 585
General and Administrative      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Allocated Share-based Compensation Expense 2,020 616 594
Engineering And Development      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Allocated Share-based Compensation Expense $ 318 $ 82 $ 142