Quarterly report pursuant to Section 13 or 15(d)

Equity Incentive Plans - Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations (Details)

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Equity Incentive Plans - Schedule of Stock-Based Compensation Expense Recorded in Condensed Consolidated Statements of Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 748 $ 231 $ 1,823 $ 306
Cost of Revenue        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 97 33 229 43
Sale and Marketing        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 273 54 538 74
Research and Development        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense 98 26 206 42
General and Administrative        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Stock-based compensation expense $ 280 $ 118 $ 850 $ 147