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Revenue - Narrative (Details)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
USD ($)
Mar. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
tranche
$ / shares
shares
Class of Warrant or Right [Line Items]          
Fair value of warrants outstanding $ 16,399   $ 31,230    
Change in fair value of warrant liabilities (3,857) $ (46,649)      
Contract assets 14,772   9,907 $ 0  
Contract liabilities $ 900   900    
VCTF warrant          
Class of Warrant or Right [Line Items]          
Number of tranches | tranche         2
Fair value of warrants outstanding         $ 2,900
Change in fair value of warrant liabilities     $ 1,000    
Class A Common Stock | VCTF warrant          
Class of Warrant or Right [Line Items]          
Conversion of warrants into securities (in shares) | shares         4,089,280
Stock price of warrants (in dollars per share) | $ / shares         $ 3.1769