Consolidated Balance Sheets (Parenthetical) (USD $)	Jul. 31, 2012
Consolidated Balance Sheets [Abstract]
Preferred stock, par value	$ 0.01
Preferred stock, shares authorized	5,000,000
Preferred stock, shares issued	0
Common stock, par value	$ 0.01
Common stock, shares authorized	100,000,000
Common stock, shares issued	6,644,555