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Segments (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Segments    
management charges incurred by the U.S. segment but allocated to the Canadian segment $ 300 $ 300
Operating Revenues 74,154 96,846
Net Property and Equipment 12,979 16,508
Capital Expenditures 2,859 5,178
Operating Lease Right-of-use Assets 3,002 3,208
United States    
Segments    
Operating Revenues 61,229 83,823
Net Property and Equipment 10,818 14,386
Capital Expenditures 1,640 3,479
Operating Lease Right-of-use Assets 1,881 2,808
Canada    
Segments    
Operating Revenues 12,925 13,023
Net Property and Equipment 2,161 2,122
Capital Expenditures 1,219 1,699
Operating Lease Right-of-use Assets $ 1,121 $ 400