Note 4 - Goodwill and Other Intangible Assets (Details) - Changes in Carrying Amount of Goodwill (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2015	Nov. 29, 2014
Goodwill [Line Items]
Balance as of November 29, 2014		$ 1,731
Balance as of February 28, 2015	12,021	1,731
Wholesale Segment [Member] | Zenith Freight Lines [Member]
Goodwill [Line Items]
Goodwill arising from acquisition of Zenith	3,874
Wholesale Segment [Member]
Goodwill [Line Items]
Balance as of November 29, 2014		1,129
Balance as of February 28, 2015	5,003	1,129
Retail Segment [Member] | Zenith Freight Lines [Member]
Goodwill [Line Items]
Goodwill arising from acquisition of Zenith	1,271
Retail Segment [Member]
Goodwill [Line Items]
Balance as of November 29, 2014		602
Balance as of February 28, 2015	1,873	602
Logistical Services [Member] | Zenith Freight Lines [Member]
Goodwill [Line Items]
Goodwill arising from acquisition of Zenith	5,145
Logistical Services [Member]
Goodwill [Line Items]
Balance as of February 28, 2015	5,145
Zenith Freight Lines [Member]
Goodwill [Line Items]
Balance as of February 28, 2015	10,292
Goodwill arising from acquisition of Zenith	$ 10,290