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Note 3 - Business Combination - Acquisition of Zenith (Details Textual)
$ / shares in Units, $ in Thousands
2 Months Ended 3 Months Ended 12 Months Ended
Feb. 02, 2015
USD ($)
Feb. 01, 2015
USD ($)
Feb. 27, 2016
USD ($)
Feb. 28, 2015
USD ($)
$ / shares
Nov. 28, 2015
USD ($)
Zenith Freight Lines [Member] | Long-term Debt [Member]          
Debt Instrument, Periodic Payment $ 3,000        
Zenith Freight Lines [Member]          
Equity Method Investment, Ownership Percentage   49.00%      
Business Acquisition, Percentage of Voting Interests Acquired 51.00%        
Business Combination, Consideration Transferred $ 19,111     $ 19,111  
Debt Instrument, Periodic Payment, Number of Installments 3        
Equity Method Investments, Carrying Value Prior to Step Acquisition Remeasurement   $ 9,480      
Business Combination, Step Acquisition, Equity Interest in Acquiree, Fair Value       $ 16,692  
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain         $ 7,212
Basic Earnings Per Share Adjustment | $ / shares       $ 0.42  
Business Acquisition, Goodwill, Expected Tax Deductible Amount         $ 6,982
Business Combination, Acquisition Related Costs       $ 121  
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual     $ 14,471 3,259  
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual     $ 695 (20)  
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain     $ 7,212