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Note 18 - Lease Income (Details Textual) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Trucks [Member]    
Property Subject to or Available for Operating Lease, Gross $ 61,061,000 $ 42,206,000
Property Subject to or Available for Operating Lease, Net, Total 34,299,000 17,028,000
Operating Leases, Future Minimum Payments Receivable, Total $ 22,319,000 9,360,000
Trucks [Member] | Minimum [Member]    
Lessor, Operating Lease, Term of Contract 210 days  
Trucks [Member] | Maximum [Member]    
Lessor, Operating Lease, Term of Contract 5 years  
Building [Member]    
Property Subject to or Available for Operating Lease, Gross $ 1,697,000 1,697,000
Property Subject to or Available for Operating Lease, Net, Total 1,138,000 $ 1,195,000
Operating Leases, Future Minimum Payments Receivable, Total $ 12,000