Note 13 - Change in Accounting Estimate	6 Months Ended
Jun. 30, 2013
Disclosure Text Block Supplement [Abstract]
Accounting Changes [Text Block]	NOTE 13 –change in accounting estimate Effective June 1, 2013, the Company increased the depreciation periods for certain of its owned tractors and reduced the salvage values of those tractors. The depreciation period for single driver tractors was increased from 45 to 60 months, and the salvage value was reduced from 43% to 30% of the purchase price. The depreciation period for team tractors was increased from 36 to 48 months, and the salvage value was reduced from 43% to 40% of the purchase price. The Company believes that these changes more appropriately reflect the current rates of tractor utilization and accordingly will more reasonably report balance sheet values. This change is being accounted for as a change in estimate which, during the quarter ended June 30, 2013, resulted in a reduction of pre-tax depreciation expense of approximately $0.20 million and approximately $0.13 million ($0.01 per share) on a net of tax basis.

Note 13 - Change in Accounting Estimate

6 Months Ended

Jun. 30, 2013

Disclosure Text Block Supplement [Abstract]

NOTE 13 –change in accounting estimate

Effective June 1, 2013, the Company increased the depreciation periods for certain of its owned tractors and reduced the salvage values of those tractors. The depreciation period for single driver tractors was increased from 45 to 60 months, and the salvage value was reduced from 43% to 30% of the purchase price. The depreciation period for team tractors was increased from 36 to 48 months, and the salvage value was reduced from 43% to 40% of the purchase price.

The Company believes that these changes more appropriately reflect the current rates of tractor utilization and accordingly will more reasonably report balance sheet values. This change is being accounted for as a change in estimate which, during the quarter ended June 30, 2013, resulted in a reduction of pre-tax depreciation expense of approximately $0.20 million and approximately $0.13 million ($0.01 per share) on a net of tax basis.