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Share-Based Compensation - Summary of Share-Based Compensation Expense (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Total $ 646 $ 1,022 $ 1,842 $ 1,523
Cost of Revenues        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Total 15 19 31 29
Sales and Marketing        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Total 236 404 666 608
General and Administrative        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Total 261 479 868 697
Research and Development        
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]        
Total $ 134 $ 120 $ 277 $ 189