Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Nov. 30, 2012	Aug. 31, 2012
Preferred stock, without par value	$ 0	$ 0
Preferred stock, shares authorized	25,000	25,000
Preferred stock, outstanding	0	0
Common stock, without par value	$ 0	$ 0
Common stock, shares authorized	50,000	50,000
Common stock, shares outstanding	27,195	27,143