Note 11 - Goodwill and Other Intangible Assets (Details Textual) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)
Goodwill, Impairment Loss	$ 0
Finite-Lived Intangible Assets, Accumulated Amortization	1,500	$ 1,500
Acquired Finite-lived Intangible Asset, Residual Value	0	0
Amortization of Intangible Assets	1,500	1,500
Finite-Lived Intangible Assets, Amortization Expense, Annual Amount	7,500	$ 7,500
Goodwill, Period Increase (Decrease)	0
Special Logistics Dedicated, LLC [Member]
Goodwill, Acquired During Period	56,000
Finite-lived Intangible Assets Acquired	$ 60,000