Note 6 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation	Aug. 30, 2014	Aug. 31, 2013	Aug. 25, 2012
Pension Plan [Member]
Note 6 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation [Line Items]
Discount rate	3.60%	4.30%
Rate of compensation increase
Supplemental Executive Retirement Plan [Member]
Note 6 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation [Line Items]
Discount rate	3.80%	4.60%
Rate of compensation increase	5.00%	5.00%	5.00%