Note 7 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation	Aug. 29, 2015	Aug. 30, 2014	Aug. 31, 2013
Pension Plan [Member]
Note 7 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation [Line Items]
Discount rate	3.80%	3.60%
Rate of compensation increase
Supplemental Executive Retirement Plan [Member]
Note 7 - Employee Benefit Plans (Details) - Weighted Average Assumptions Used In Calculating the Company's Projected Benefit Obligation [Line Items]
Discount rate	4.10%	3.80%
Rate of compensation increase	5.00%	5.00%	5.00%