Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Jul. 31, 2011	Oct. 31, 2010
Current liabilities:
Preferred stock, liquidation preference value	$ 64,020	$ 64,020
Shareholders' (deficit) equity
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	225,000,000	225,000,000
Common stock, shares issued	127,116,539	112,965,725
Common stock, shares outstanding	127,116,539	112,965,725
Treasury stock, shares	5,679	5,679