Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	May 31, 2014	Aug. 31, 2013
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 707	$ 982
Common stock, par value	$ 0.05	$ 0.05
Common stock, shares authorized	40,000,000	40,000,000
Common stock, shares issued	27,056,000	27,056,000
Treasury stock, shares	10,370,000	10,759,000