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Equity incentive Plans - Summary of Compensation Costs Related to Stock Options and RSUS Included on Statements of Operations (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total share-based compensation expense $ 43,251 $ 24,761 $ 13,124
Cost of Revenue      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total share-based compensation expense 2,100 817 555
Research and Development      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total share-based compensation expense 14,061 8,519 3,934
Sales and Marketing      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total share-based compensation expense 12,312 6,627 3,480
General and Administrative      
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]      
Total share-based compensation expense $ 14,778 $ 8,798 $ 5,155