Note 10 - Debt (Details) (USD $)	12 Months Ended								12 Months Ended			3 Months Ended			4 Months Ended		12 Months Ended					12 Months Ended					12 Months Ended
	Aug. 28, 2013	Aug. 29, 2012	Aug. 31, 2011	Aug. 28, 2013 Discontinue Operations (Member)	Aug. 29, 2012 Discontinue Operations (Member)	Aug. 31, 2011 Discontinue Operations (Member)	Aug. 14, 2013 Max Amount Outstanding at Any One Time [Member] 2013 Revolving Credit Facility [Member]	Aug. 28, 2013 Lease Adjusted Leverage Ratio Limitation Applied [Member]	Aug. 29, 2012 Each Fiscal Year [Member] 2009 Revolving Credit Facility [Member]	Aug. 28, 2013 2013 Revolving Credit Facility [Member]	Aug. 14, 2013 2013 Revolving Credit Facility [Member]	May 04, 2011 2009 Revolving Credit Facility [Member]	Feb. 09, 2011 2009 Revolving Credit Facility [Member]	Nov. 17, 2010 2009 Revolving Credit Facility [Member]	Aug. 31, 2011 2009 Revolving Credit Facility [Member]	Aug. 25, 2010 2009 Revolving Credit Facility [Member]	Aug. 29, 2012 2009 Revolving Credit Facility [Member]	Aug. 31, 2011 2009 Revolving Credit Facility [Member]	Aug. 25, 2011 2009 Revolving Credit Facility [Member]	May 31, 2011 2009 Revolving Credit Facility [Member]	Feb. 28, 2011 2009 Revolving Credit Facility [Member]	Aug. 28, 2013 Minimum [Member] 2013 Revolving Credit Facility [Member]	Aug. 29, 2012 Minimum [Member] 2009 Revolving Credit Facility [Member]	Aug. 29, 2013 Minimum [Member] 2009 Revolving Credit Facility [Member]	Aug. 31, 2012 Minimum [Member] 2009 Revolving Credit Facility [Member]	Sep. 02, 2011 Minimum [Member] 2009 Revolving Credit Facility [Member]	Aug. 28, 2013 Maximum [Member] 2013 Revolving Credit Facility [Member]	Aug. 29, 2012 Maximum [Member] 2009 Revolving Credit Facility [Member]	Aug. 29, 2013 Maximum [Member] 2009 Revolving Credit Facility [Member]	Aug. 31, 2012 Maximum [Member] 2009 Revolving Credit Facility [Member]	Sep. 02, 2011 Maximum [Member] 2009 Revolving Credit Facility [Member]
Note 10 - Debt (Details) [Line Items]
Aggregate Amount Of Lender Commitments On Credit Facility										$ 70,000,000							$ 50,000,000
Letter Of Credit Facility Outstanding							15,000,000				5,000,000						15,000,000
Line of Credit Facility, Maximum Borrowing Capacity	49,800,000									90,000,000
Line of Credit Facility, Remaining Borrowing Capacity								41,000,000
Federal Funds Effective Rate Plus Percentage										0.50%							0.50%
Line Of Credit Facility Basis Spread On Prime Rate																						0.75%	1.00%				1.75%	2.00%
London Interbank Offered Rate																						2.50%	2.75%				3.50%	3.75%
Line of Credit Facility, Commitment Fee Percentage																						0.30%	0.30%				0.40%	0.45%
Line Of Credit Facility Collateral Amount										86,500,000
Debt Service Coverage Ratio																						1.00		1.00	1.00	1.00	2.50		2.50	2.25	2.00
Minimum Quarterly Net Profits										1.00							1.00
Lease Adjusted Leverage Ratio																						1.00					4.25
Term Loans Outstanding										19,200,000
Outstanding Commitments Letters Of Credit										1,000,000
Guarantee Of Indebtedness																	13,000,000
Line Of Credit Facility Reduction In Available Balance																			0	6,000,000	9,500,000
Maintenance of Earnings before Taxes Interest Depreciation and Amortization												7,000,000	3,500,000	2,500,000	6,500,000	4,500,000
Minimum Tangible Net Worth												126,700,000
Percentage of Consolidated Net Income																	60.00%
Capital Expenditure Limit									38,000,000								34,900,000	15,000,000
Percentage of Earnings before Taxes Interest Depreciation and Amortization																	130.00%
Interest Expense Total	900,000	900,000	2,400,000
Interest Paid	800,000	800,000	1,700,000
Interest Expense, Debt				0	0	0
Interest Costs Capitalized	$ 0	$ 0	$ 0