Consolidated Balance Sheets (Parenthetical) - $ / shares None in scaling factor is -9223372036854775296	May. 31, 2015	Aug. 31, 2014
Preferred stock, without par value
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, outstanding
Common stock, without par value
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares outstanding	28,925,000	27,364,000