Note 4 - Fair Value Measurements (Details) - Fair Value, Measurements, Recurring [Member] - USD ($)	May 28, 2016	Aug. 29, 2015
Fair Value, Inputs, Level 1 [Member]
Cash equivalents	$ 52,615,000	$ 42,093,000
Pension plan assets	0	0
Foreign currency forward contracts	0	0
Total assets at fair value	52,615,000	42,093,000
Fair Value, Inputs, Level 2 [Member]
Cash equivalents	0	0
Pension plan assets	4,661,000	4,757,000
Foreign currency forward contracts	220,000	524,000
Total assets at fair value	4,881,000	5,281,000
Cash equivalents	52,615,000	42,093,000
Pension plan assets	4,661,000	4,757,000
Foreign currency forward contracts	220,000	524,000
Total assets at fair value	$ 57,496,000	$ 47,374,000