Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Classification of Compensation Expense Associated with Share-Based Payments (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 757 $ 701
Cost of Revenue    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Allocated Share-based Compensation Expense 82 57
Sales and Marketing    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Allocated Share-based Compensation Expense 160 80
General and Administrative    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Allocated Share-based Compensation Expense 441 467
Engineering and Development    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Allocated Share-based Compensation Expense $ 74 $ 97