XML 40 R28.htm IDEA: XBRL DOCUMENT v3.21.2
Organization, Properties, Basis of Presentation, Financial Instruments and Recent Accounting Standards - Cash, Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Cash, Cash Equivalents and Restricted Cash        
Cash and cash equivalents $ 5,053   $ 4,840  
Restricted cash 4,678      
Total cash, cash equivalents and restricted cash $ 9,731 $ 4,150 $ 4,840 $ 9,790