Note 11 - Share-Based Compensation (Detail) - Company’s stock option activity for the quarter: (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended
	Feb. 13, 2013
Granted	109,335
Granted (in Dollars per share)	$ 5.95
Exercised	(41,489)
Exercised (in Dollars per share)	$ 3.78
Forfeited/Expired	(299,485)
Exercisable at February 13, 2013	660,687
Exercisable at February 13, 2013 (in Dollars per share)	$ 5.36
Exercisable at February 13, 2013	4 years 146 days
Exercisable at February 13, 2013 (in Dollars)	$ 1,852
Beginning of Period [Member]
Outstanding at August 29, 2012	1,175,224
Outstanding at August 29, 2012 (in Dollars per share)	$ 6.31
Outstanding at August 29, 2012	3 years 292 days
Outstanding at August 29, 2012 (in Dollars)	1,456
Outstanding at February 13, 2013	3 years 292 days
End of Period [Member]
Outstanding at August 29, 2012	5 years
Outstanding at February 13, 2013	943,585
Outstanding at February 13, 2013 (in Dollars per share)	$ 5.24
Outstanding at February 13, 2013	5 years
Outstanding at February 13, 2013 (in Dollars)	$ 2,654