Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 01, 2012	Aug. 31, 2012
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 667	$ 851
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	40,000	40,000
Common stock, shares issued	27,056	27,056
Treasury stock, shares	8,906	9,365