XML 84 R60.htm IDEA: XBRL DOCUMENT v3.20.4
Fair Value of Financial Instruments - Liabilities (Details) - Recurring - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Level 2    
Liabilities, Fair Value Disclosure [Abstract]    
Financial and Nonfinancial Liabilities, Fair Value Disclosure $ 0 $ 0
Level 3    
Liabilities, Fair Value Disclosure [Abstract]    
Financial and Nonfinancial Liabilities, Fair Value Disclosure $ 0 $ 0