Note 7 - Amounts Recorded in Consolidated Balance Sheet (Details) - USD ($) $ in Thousands	Aug. 27, 2016	Aug. 29, 2015
Pension Plan [Member]
Deferred tax assets	$ 1,119	$ 988
Accrued liabilities	4,247	3,722
Accumulated other comprehensive loss	(1,788)	(1,538)
Supplemental Executive Retirement Plan [Member]
Deferred tax assets	4,046	1,975
Accrued liabilities	30,696	23,285
Accumulated other comprehensive loss	$ (6,463)	$ (3,181)