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Summary of Significant Accounting Policies - Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Mar. 31, 2021
Dec. 31, 2020
Accounting Policies [Abstract]        
Cash and cash equivalents $ 34,830 $ 18,981    
Restricted cash 3,175 4,215    
Cash and cash equivalents and restricted cash—end of period $ 38,005 $ 23,196 $ 22,317 $ 20,339