Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Jul. 31, 2015	Oct. 31, 2014
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)	118,725,874	106,979,960
Common stock, shares outstanding (in shares)	118,725,874	106,979,960