Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jul. 31, 2012	Oct. 31, 2011
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	225,000,000
Common stock, shares issued	185,864,074	138,400,497
Common stock, shares outstanding	185,864,074	138,400,497
Treasury stock, shares	5,679	5,679