XML 72 R58.htm IDEA: XBRL DOCUMENT v3.20.4
Areas of Operation (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Areas of Operation    
Operating Revenues $ 86,100 $ 145,773
Net Property and Equipment 38,900 53,549
Right-of-use Assets 5,494 6,605
United States    
Areas of Operation    
Operating Revenues 73,983 129,452
Net Property and Equipment 33,162 45,653
Right-of-use Assets 4,900 5,893
Canada    
Areas of Operation    
Operating Revenues 12,117 16,321
Net Property and Equipment 5,738 7,896
Right-of-use Assets $ 594 $ 712