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Note 7 - Debt - Current and Long-term Debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Borrowings under Credit Facility $ 4,001 $ 9,007
Long-term debt, current 25,550 24,596
Long-term debt, noncurrent 164,415 164,465
Deferred loan costs, current (140) (140)
Deferred loan costs, noncurrent (278) (298)
Principal portion of capital lease obligations, secured by related revenue equipment, current 2,971 2,962
Principal portion of capital lease obligations, secured by related revenue equipment, noncurrent 20,967 21,777
Total debt and capital lease obligations, current 28,521 27,558
Total debt and capital lease obligations, noncurrent 185,382 186,242
Revenue Equipment Installment Notes [Member]    
Long-term debt, current 24,675 23,732
Long-term debt, noncurrent 136,139 130,946
Real Estate Note [Member]    
Long-term debt, current 1,015 1,004
Long-term debt, noncurrent $ 24,553 $ 24,810