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Financial Statement Components - Prepaid Expenses and Other Current Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Prepaid expenses $ 14,651 $ 1,073
Contract assets 9,907 0
Advance payments to vendors 1,810 961
Prepaid rent and other 0 503
Other receivables 2,827 2,260
Total prepaid expenses and other current assets $ 29,195 $ 4,797