Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized in Income Statement (Details)

v3.19.1
Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized in Income Statement (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Class Of Stock [Line Items]    
Stock-based compensation expense $ 3,586 $ 3,381
Cost of Revenue    
Class Of Stock [Line Items]    
Stock-based compensation expense 285 273
Research and Development    
Class Of Stock [Line Items]    
Stock-based compensation expense 377 331
Sales and Marketing    
Class Of Stock [Line Items]    
Stock-based compensation expense 690 548
General and Administrative    
Class Of Stock [Line Items]    
Stock-based compensation expense $ 2,234 $ 2,229