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Note 7 - Debt (Tables) | 12 Months Ended
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Dec. 31, 2017
Notes Tables |
Schedule of Debt [Table Text Block] |
(in thousands) |  | December 31, 2017 |  |  | December 31, 2016 |
|  | Current |  |  | Long-Term |  |  | Current |  |  | Long-Term |
Borrowings under Credit Facility |  | $ | - |  |  | $ | 9,007 |  |  | $ | - |  |  | $ | 12,185 |
Revenue equipment installment notes; weighted average interest rate of 3.3% at December 31, 2017, and 3.3% December 31, 2016, due in monthly installments with final maturities at various dates ranging from January 2018 to September 2023, secured by related revenue equipment |  |  | 23,732 |  |  |  | 130,946 |  |  |  | 23,986 |  |  |  | 127,840 |
Real estate notes; interest rate of 3.1% at December 31, 2017 due in monthly installments with a fixed maturity at August 2035 and weighted average interest rate of 2.4% at December 31, 2016 due in monthly installments with fixed maturities at December 2018 and August 2035, secured by related real estate |  |  | 1,004 |  |  |  | 24,810 |  |  |  | 1,224 |  |  |  | 28,907 |
Deferred loan costs |  |  | (140 | ) |  |  | (298 | ) |  |  | (263 | ) |  |  | (256 | )
Total debt |  |  | 24,596 |  |  |  | 164,465 |  |  |  | 24,947 |  |  |  | 168,676 |
Principal portion of capital lease obligations, secured by related revenue equipment |  |  | 2,962 |  |  |  | 21,777 |  |  |  | 2,441 |  |  |  | 19,761 |
Total debt and capital lease obligations |  | $ | 27,558 |  |  | $ | 186,242 |  |  | $ | 27,388 |  |  | $ | 188,437 |
Schedule of Maturities of Long-term Debt [Table Text Block] |
|  | (in thousands) |
2018 |  | $ | 24,736 |
2019 |  |  | 25,578 |
2020 |  |  | 47,957 |
2021 |  |  | 46,410 |
2022 |  |  | 22,018 |
Thereafter |  | $ | 22,800 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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