Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Jun. 30, 2011
Stockholders' equity
Preferred stock, no par value
Preferred stock, shares authorized	2,500,000	2,500,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, no par value
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	18,583,496	18,339,609
Treasury stock, shares	311,660	311,660