Note 3 - Fair Value Measurements (Details) - Fair Value Measurments (USD $) In Thousands, unless otherwise specified	Aug. 31, 2013	Aug. 25, 2012
Assets:
Total	$ 33,325	$ 34,978
Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
Assets:
Cash equivalents	33,325	34,978
Fair Value, Inputs, Level 1 [Member]
Assets:
Total	33,325	34,978
Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
Assets:
Cash equivalents	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Total	0	0
Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
Assets:
Cash equivalents	0	0
Fair Value, Inputs, Level 3 [Member]
Assets:
Total	0	0
Cash Equivalents [Member]
Assets:
Cash equivalents	$ 33,325	$ 34,978