Note 7 - Employee Benefit Plans (Details) - Weighted average assumptions used in calculating the Company’s projected benefit obligation	Aug. 31, 2013	Aug. 25, 2012	Aug. 27, 2011
Pension Plans [Member]
Note 7 - Employee Benefit Plans (Details) - Weighted average assumptions used in calculating the Company’s projected benefit obligation [Line Items]
Discount rate	4.30%	3.30%
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	4.60%	3.60%
Rate of compensation increase	5.00%	5.00%	5.00%