XML 50 R39.htm IDEA: XBRL DOCUMENT v3.21.1
Fair Value Disclosures (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Mutual funds $ 1,228 $ 1,176
Level 1    
Mutual funds 1,228 1,176
Level 2    
Mutual funds 0 0
Level 3    
Mutual funds $ 0 $ 0