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Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Dec. 31, 2019
Sep. 30, 2019
Dec. 31, 2018
Restricted Cash        
Face amount $ 5,000      
Restricted cash required reserve 3,900      
Reconciliation of cash and cash equivalents and restricted cash per the balance sheet to the statement of cash flows        
Cash and cash equivalents 22,534 $ 34,091    
Restricted cash (including $2,222 and $3,333 in other assets as of September 30, 2020 and December 31, 2019, respectively) 3,928 5,039    
Total 26,462 39,130 $ 14,974 $ 135,633
Other assets, restricted cash $ 2,222 $ 3,333