Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jul. 31, 2013	Oct. 31, 2012
Stockholders' equity (deficit):
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	20,000,000	20,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	290,000,000	290,000,000
Common stock, shares issued (in shares)	103,121,807	100,601,792
Common stock, shares outstanding (in shares)	103,121,807	100,601,792