Note 1 - Fair Value Assumptions - Stock-based Compensation (Details)	12 Months Ended
	Aug. 30, 2015	Aug. 31, 2014	Aug. 25, 2013
Minimum [Member]
Dividend yield	2.20%	2.20%	2.30%
Expected volatility	51.20%	52.40%	72.40%
Risk free interest rate	1.70%	1.60%	0.80%
Expected term (in years)	5 years	5 years	5 years
Maximum [Member]
Dividend yield	2.70%	2.60%	3.30%
Expected volatility	51.30%	62.60%	79.00%
Risk free interest rate	2.30%	2.90%	1.90%
Expected term (in years)	10 years	10 years	10 years
Expected term (in years)	10 years