Note 6 - Income Taxes (Details) - Reconciliation of the Expense (Benefit) for Income Taxes (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 27, 2014	Aug. 28, 2013	Aug. 29, 2012
Reconciliation of the Expense (Benefit) for Income Taxes [Abstract]
Income tax expense (benefit) from continuing operations at the federal rate	$ (1,120)	$ 2,149	$ 3,078
Income tax expense (benefit) from continuing operations at the federal rate	34.00%	34.00%	34.00%
Federal jobs tax credits (wage deductions)	404	355	217
Federal jobs tax credits (wage deductions)	(12.30%)	5.60%	2.40%
Stock options and restricted stock	54	50	141
Stock options and restricted stock	(1.70%)	0.80%	1.60%
Other permanent differences	185	68	128
Other permanent differences	(5.60%)	1.10%	1.40%
State income tax, net of federal benefit	52	338	1,407
State income tax, net of federal benefit	(1.60%)	5.30%	15.60%
General Business Tax Credits	(1,187)	(1,043)	(639)
General Business Tax Credits	36.10%	(16.50%)	(7.10%)
Other	(48)	(142)	(39)
Other	1.50%	(2.20%)	(0.40%)
Change in valuation allowance			(2,639)
Change in valuation allowance			(29.20%)
Income tax expense from continuing operations	$ (1,660)	$ 1,775	$ 1,654
Income tax expense from continuing operations	50.40%	28.10%	18.30%