Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details)

v3.20.4
Summary of Significant Accounting Policies - Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 5,507 $ 2,765    
Restricted cash 5,246 4,420    
Total cash and cash equivalents and restricted cash $ 10,753 $ 7,185 $ 4,843 $ 7,114