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Note M - Leases - Lease Revenue (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Lease revenue $ 2,612 $ 2,168 $ 4,731 $ 4,315
Trucks under Operating Lease [Member]        
Lease revenue 2,501 2,069 4,492 4,118
Dock Space under Operating Lease [Member]        
Lease revenue $ 111 $ 99 $ 239 $ 197