Note 3 - Business Combination - Acquisition of Zenith - Allocation of Fair Value of the Acquired Business (Details)	Feb. 02, 2015 USD ($)
Zenith Freight Lines [Member]
Acquired cash and cash equivalents	$ 1,677,000
Accounts receivable, net	3,399,000
Prepaid expenses and other current assets	496,000
Property and equipment	18,110,000
Other long-term assets	646,000
Intangible assets	6,362,000
Total identifiable assets acquired	30,690,000
Accounts payable and accrued liabilities	(4,038,000)
Notes payable	(4,329,000)
Total liabilities assumed	(8,367,000)
Net identifiable assets acquired	22,323,000
Goodwill	9,858,000
Total net assets acquired	$ 32,181,000