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Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 4,889 $ 1,902    
Restricted cash 15,513 8,083    
Total cash, cash equivalents and restricted cash $ 20,402 $ 9,985 $ 21,077 $ 36,217