Note 13 - Operating Leases (Details) - Rent Expense for Operating Leases (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 28, 2013	Aug. 29, 2012	Aug. 31, 2011
Note 13 - Operating Leases (Details) - Rent Expense for Operating Leases [Line Items]
Total rent expense (including amounts in discontinued operations)	$ 14,488	$ 12,118	$ 12,014
Percent of sales	3.70%	3.50%	3.40%
Contingent rentals	182	235	420
Building [Member]
Note 13 - Operating Leases (Details) - Rent Expense for Operating Leases [Line Items]
Minimum rent	13,488	11,132	10,717
Equipment [Member]
Note 13 - Operating Leases (Details) - Rent Expense for Operating Leases [Line Items]
Minimum rent	$ 818	$ 751	$ 877