XML 88 R74.htm IDEA: XBRL DOCUMENT v3.20.4
Summary of Significant Accounting Policies - Cash Equivalents and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Nov. 19, 2020
Nov. 18, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Accounting Policies [Abstract]            
Cash and cash equivalents $ 15,856 $ 8,754 $ 74,071 $ 20,019    
Restricted cash 4,370 11,800 $ 0 0    
Total cash, cash equivalents and restricted cash $ 20,226 $ 20,554   $ 20,019 $ 22,190 $ 16,720