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Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) [Abstract]        
Product revenue $ 0 $ 106 $ 81 $ 106
Other revenues 0 0 300 0
Total revenue 0 106 381 106
Costs of goods sold (332) 0 (363) 0
Gross profit (loss) (332) 106 18 106
Operating expenses        
Selling, general and administrative 6,263 7,218 12,346 14,643
Research and development 3,992 8,204 8,462 15,335
Total operating expenses 10,255 15,422 20,808 29,978
Operating loss (10,587) (15,316) (20,790) (29,872)
Change in fair value of warrant liability, net 5,115 917 2,842 579
Interest income 5 4 15 7
Other expense and interest expense (15) (117) (395) (115)
Net loss (5,482) (14,512) (18,328) (29,401)
Common share data:        
Basic and diluted loss per share (in dollars per share) $ (0.06) $ (0.26) $ (0.20) $ (0.57)
Weighted average number of basic and diluted common shares outstanding (in shares) 96,380,562 54,847,807 90,934,084 51,582,458
Other comprehensive income (loss):        
Foreign currency translation adjustments 6 0 369 0
Comprehensive loss $ (5,476) $ (14,512) $ (17,959) $ (29,401)