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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS [Abstract]    
Revenue - Royalties $ 0 $ 17
Operating expenses:    
Research and development 256 196
General, selling and administrative 6,967 2,573
Total operating expenses 7,223 2,769
Loss from operations (7,223) (2,752)
Gain (loss) on change in value of derivative liability 269 (5,130)
Interest income, net 74 60
Loss before taxes (6,880) (7,822)
Income tax benefit (2,173) (700)
Net loss $ (4,707) $ (7,122)
Basic earnings (loss) per share: (in dollars per share) $ (0.09) $ (0.14)
Diluted earnings (loss) per share: (in dollars per share) $ (0.09) $ (0.14)
Weighted average shares outstanding basic (in shares) 50,658 49,461
Weighted average shares outstanding diluted (in shares) 50,658 49,461