Quarterly report pursuant to Section 13 or 15(d)

Cash, Cash Equivalents, and Restricted Cash - Cash and Restricted Cash (Details)

v3.21.2
Cash, Cash Equivalents, and Restricted Cash - Cash and Restricted Cash (Details) - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Cash and Cash Equivalents [Abstract]        
Cash $ 882 $ 3,940    
Restricted cash 91 91    
Total cash and restricted cash $ 973 $ 4,031 $ 1,234 $ 362