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Note 10 - Other Gains and Losses (Details Textual) - USD ($) $ in Thousands	1 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended
	Apr. 30, 2017	Jun. 30, 2016	Aug. 26, 2017	May 27, 2017	Aug. 27, 2016	Aug. 26, 2017	Aug. 27, 2016	Dec. 31, 1985	Nov. 26, 2016
Litigation Settlement, Amount Awarded from Other Party		$ 1,428
Impairment of Real Estate						$ 1,084
Payments to Acquire Investments								$ 325
Proceeds from Sale of Investment Projects	$ 3,592					3,592
Gain (Loss) on Sale of Investments				$ 3,267		3,267
Gain (Loss) on Disposition of Property Plant Equipment						1,278	165
Proceeds from Sale of Property, Plant, and Equipment						4,474	632
Other Noncurrent Assets [Member]
Real Estate Investment Property, Net									$ 1,108
Antitrust Litigation Settlement [Member]
Proceeds from Legal Settlements					$ 1,428		$ 1,428
Former Retail Store, Las Vegas, Nevada [Member]
Proceeds from Sale of Property, Plant, and Equipment			4,335			4,335
Selling, General and Administrative Expenses [Member] \| Former Retail Store, Las Vegas, Nevada [Member]
Gain (Loss) on Disposition of Property Plant Equipment			$ 1,220			$ 1,220