Annual report pursuant to Section 13 and 15(d)

Significant Accounting Policies (Details)

v3.20.4
Significant Accounting Policies (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Accounting Policies [Abstract]      
Cash and cash equivalents $ 3,693 $ 33,794  
Restricted cash 1,569 7,610  
Cash and cash equivalents and restricted cash $ 5,262 $ 41,404 $ 30,036