Note 3 - Fair Value of Acquired Business (Details) - Zenith Freight Lines [Member]	12 Months Ended
	Nov. 28, 2015 USD ($)
Cash	$ 9,000,000
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable	1,675,000
Note payable	8,436,000
Total fair value of consideration transferred to seller	19,111,000
Less effective settlement of previous amounts payable to Zenith at acquisition	(3,622,000)
Total fair value of consideration net of effective settlement	15,489,000
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value	16,692,000
Total fair value of acquired business	$ 32,181,000