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Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Apr. 30, 2013 | Oct. 31, 2012
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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

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