Note 3 - Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Aug. 27, 2016	Aug. 29, 2015
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	$ 172,760	$ 42,093
Pension plan assets
Foreign currency forward contracts
Total assets at fair value	172,760	42,093
Fair Value, Inputs, Level 2 [Member]
Cash equivalents
Pension plan assets	4,753	4,757
Foreign currency forward contracts	188	524
Total assets at fair value	4,941	5,281
Cash equivalents	172,760	42,093
Pension plan assets	4,753	4,757
Foreign currency forward contracts	188	524
Total assets at fair value	$ 177,701	$ 47,374