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Summary of Significant Accounting Policies - Cost of Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Mar. 31, 2021
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Product Information [Line Items]                  
Amortization of acquired technologies $ 1,037 $ 2,700 $ 6,132 $ 5,700 $ 3,741 $ 11,876 $ 24,257 $ 24,067 $ 26,428
Subscription and other revenue                  
Product Information [Line Items]                  
Amortization of acquired technologies $ 1,037   $ 6,132   $ 3,741 $ 11,876