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Revenues - Contract Balances (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Revenue from Contract with Customer [Abstract] |  |
Accounts receivable, net | $ 9,302 | $ 12,913
Change, Accounts receivable, net | $ (3,611) |
Change, Accounts receivable, net, percent | (28.00%) |
Deferred revenue | $ 49,983 | 32,620
Change, Deferred revenue | $ 17,363 |
Change, Deferred revenue, percent | 53.00% |
Contract assets | $ 16,358 | $ 13,243
Change, Contract assets | $ 3,115 |
Change, Contract assets, percent | 24.00% |

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