Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Apr. 30, 2013	Oct. 31, 2012
Statement of Financial Position [Abstract]
Preferred stock, liquidation preference value	$ 64,020	$ 64,020
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	275,000,000	275,000,000
Common stock, shares issued	191,936,178	185,856,123
Common stock, shares outstanding	191,936,178	185,856,123
Treasury stock, shares	5,679	5,679