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Note 15 - Other Gains and Losses (Details Textual) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Nov. 24, 2018	May 26, 2018	Aug. 26, 2017	Nov. 24, 2018	Nov. 25, 2017	Nov. 26, 2016
Gain (Loss) on Disposition of Property Plant Equipment, Total				$ 234	$ 1,190	$ 128
Proceeds from Sale of Property, Plant, and Equipment, Total				2,689	4,474	667
Litigation Settlement, Amount Awarded from Other Party						1,428
Asset Impairment Charges, Total				469
Gain (Loss) on Contract Termination				(301)
Leasehold Improvements [Member]
Asset Impairment Charges, Total	$ 469			469	0	0
Gain (Loss) on Contract Termination	$ 301			301
Antitrust Litigation Settlement [Member]
Proceeds from Legal Settlements						$ 1,428
Land and Building occupied by Spring, Texas Retail Store [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Total		$ 165		165
Proceeds from Sale of Property, Plant, and Equipment, Total				$ 2,463
Former Retail Store, Las Vegas, Nevada [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Total			$ 1,220
Proceeds from Sale of Property, Plant, and Equipment, Total					4,335
Former Retail Store, Las Vegas, Nevada [Member] \| Selling, General and Administrative Expenses [Member]
Gain (Loss) on Disposition of Property Plant Equipment, Total					$ 1,220