Quarterly report pursuant to Section 13 or 15(d)

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

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Stockholders' Equity - Summary of Stock-based Compensation Expense Recognized in Income Statement (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Class Of Stock [Line Items]        
Stock-based compensation expense $ 2,156 $ 809 $ 3,451 $ 1,327
Cost of Revenue        
Class Of Stock [Line Items]        
Stock-based compensation expense 160 108 279 166
Sales and Marketing        
Class Of Stock [Line Items]        
Stock-based compensation expense 314 224 541 380
General and Administrative        
Class Of Stock [Line Items]        
Stock-based compensation expense 1,475 372 2,293 609
Research and Development        
Class Of Stock [Line Items]        
Stock-based compensation expense $ 207 $ 105 $ 338 $ 172