Note 3 - Business Combination - Acquisition of Zenith (Details) - Allocation of Fair Value of the Acquired Business (USD $) In Thousands, unless otherwise specified	Feb. 28, 2015	Nov. 29, 2014
Liabilities assumed:
Goodwill	$ 12,021us-gaap_Goodwill	$ 1,731us-gaap_Goodwill
Zenith Freight Lines [Member]
Allocation of the fair value of consideration transferred:
Acquired cash and cash equivalents	1,626
Accounts receivable, net	3,399
Prepaid expenses and other current assets	493
Property and equipment	18,109
Other long-term assets	646
Intangible assets	6,362
Total identifiable assets acquired	30,635
Liabilities assumed:
Accounts payable and accrued liabilities	(4,417)
Notes payable	(4,329)
Total liabilities assumed	(8,746)
Net identifiable assets acquired	21,889
Goodwill	10,292
Total net assets acquired	$ 32,181

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Amount of assets acquired at the acquisition date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of other assets expected to be realized or consumed before one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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Amount of liabilities assumed at the acquisition date.

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Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed.

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Amount of long-term debt due after one year or the normal operating cycle, if longer, assumed at the acquisition date.

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Amount of other assets expected to be realized or consumed after one year or the normal operating cycle, if longer, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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