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Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified | Jun. 30, 2013 | Dec. 31, 2012
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Condensed Condensed Consolidated Balance Sheets [Abstract] |  |
Development Stage Enterprise, Deficit Accumulated During Development Stage | $ 183,746 | $ 135,325
Shareholders' equity: |  |
Common stock, no par value | $ 0 |
Capital stock, shares outstanding (in shares) | 81,788,835 | 81,563,498

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