Note 4. Fair Value Measurements (Details) - Fair Value Measurments (USD $) In Thousands, unless otherwise specified	May 25, 2013	Aug. 25, 2012
Assets:
Assets, fair value	$ 33,957	$ 34,978
Fair Value, Inputs, Level 1 [Member] | Cash Equivalents [Member]
Assets:
Assets, fair value	33,957	34,978
Fair Value, Inputs, Level 1 [Member]
Assets:
Assets, fair value	33,957	34,978
Fair Value, Inputs, Level 2 [Member] | Cash Equivalents [Member]
Assets:
Assets, fair value	0	0
Fair Value, Inputs, Level 2 [Member]
Assets:
Assets, fair value	0	0
Fair Value, Inputs, Level 3 [Member] | Cash Equivalents [Member]
Assets:
Assets, fair value	0	0
Fair Value, Inputs, Level 3 [Member]
Assets:
Assets, fair value	0	0
Cash Equivalents [Member]
Assets:
Assets, fair value	$ 33,957	$ 34,978