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Geographic Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 8 Months Ended | 9 Months Ended | 12 Months Ended | 185 Months Ended | 194 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Mar. 31, 1997 | Sep. 30, 2012 | Sep. 30, 2011 | Dec. 31, 2003 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009 | Dec. 31, 2008 | Dec. 31, 2007 | Dec. 31, 2006 | Dec. 31, 2005 | Dec. 31, 2004 | Mar. 31, 2003 | Mar. 31, 2002 | Mar. 31, 2001 | Mar. 31, 2000 | Mar. 31, 1999 | Mar. 31, 1998 | Dec. 31, 2011 | Sep. 30, 2012
Geographic information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue | $ 38 |  |  | $ 64 |  |  | $ 0 | $ 112 | $ 1 |  |  |  |  |  |  |  |  |  |  |  | $ 6,748 | $ 6,812
Net loss | (1,890) | (3,445) | (290) | (8,422) | (11,585) | (14,977) | (15,243) | (16,021) | (19,570) | (40,386) | (24,053) | (29,258) | (18,048) | (22,742) | (15,542) | (14,853) | (10,382) | (5,686) | (3,964) | (2,534) | (253,549) | (261,971)
Total Assets | 20,526 |  |  | 20,526 |  |  | 25,998 | 31,459 |  |  |  |  |  |  |  |  |  |  |  |  | 25,998 | 20,526
Long Lived Assets, net | 140 |  |  | 140 |  |  | 167 | 408 |  |  |  |  |  |  |  |  |  |  |  |  | 167 | 140
United States |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Geographic information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  | (75) | (4,662) | (3,007) |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  |  |  |  |  |  | 20,715 | 30,055 |  |  |  |  |  |  |  |  |  |  |  |  | 20,715 |
Long Lived Assets, net |  |  |  |  |  |  | 45 | 161 |  |  |  |  |  |  |  |  |  |  |  |  | 45 |
United States | Continuing operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Geographic information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  | 565 | (3,531) | (1,458) |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  |  |  |  |  |  | 20,402 | 29,743 |  |  |  |  |  |  |  |  |  |  |  |  | 20,402 |
Long Lived Assets, net |  |  |  |  |  |  | 45 | 161 |  |  |  |  |  |  |  |  |  |  |  |  | 45 |
United States | Discontinued operations |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Geographic information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  | (640) | (1,131) | (1,549) |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  |  |  |  |  |  | 313 | 312 |  |  |  |  |  |  |  |  |  |  |  |  | 313 |
United Kingdom |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Geographic information |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenue |  |  |  |  |  |  |  | 112 | 1 |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  |  |  |  |  |  | (15,168) | (11,359) | (16,563) |  |  |  |  |  |  |  |  |  |  |  |  |
Total Assets |  |  |  |  |  |  | 5,283 | 1,404 |  |  |  |  |  |  |  |  |  |  |  |  | 5,283 |
Long Lived Assets, net |  |  |  |  |  |  | $ 122 | $ 247 |  |  |  |  |  |  |  |  |  |  |  |  | $ 122 |

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