Note 10 - Related Parties (Details) - Affiliated rents paid for this restaurant property lease (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Nov. 20, 2013	Nov. 21, 2012
Related Party Transaction [Line Items]
General and administrative expenses	$ 8,029	$ 7,378
RELATIVE TOTAL COMPANY COSTS:
AFFILIATED COSTS INCURRED AS A PERCENTAGE OF RELATIVE TOTAL COMPANY COSTS	0.18%	0.39%
Affiliated Cost Incurred [Member]
Related Party Transaction [Line Items]
General and administrative expenses		13
Other operating expenses, occupancy costs and opening costs	69	106
Total	69	119
Relative Company Cost [Member]
Related Party Transaction [Line Items]
General and administrative expenses	8,029	7,378
Other operating expenses, occupancy costs and opening costs	20,856	17,588
Total	38,092	29,840
RELATIVE TOTAL COMPANY COSTS:
Capital expenditures	$ 9,207	$ 4,874