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Condensed Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Revenue:    
Product revenue $ 8,691 $ 6,183
Government grants and cooperative agreements 91 436
Total revenue 8,782 6,619
Cost of product revenue 5,514 3,529
Gross profit 3,268 3,090
Operating expenses:    
Research and development 1,824 1,808
Selling, general and administrative 5,966 5,528
Amortization of intangible assets 50 50
Total operating expenses 7,840 7,386
Loss from operations (4,572) (4,296)
Non-operating expense, net:    
Loss from revaluation of warrant liability (4,461) (1,278)
Foreign exchange gain 330 693
Interest expense (139) (233)
Other income, net 8 16
Total non-operating expense, net (4,262) (802)
Net loss $ (8,834) $ (5,098)
Net loss per common share:    
Basic $ (0.17) $ (0.11)
Diluted $ (0.17) $ (0.11)
Weighted average common shares outstanding used for calculating net loss per common share:    
Basic 53,088 47,450
Diluted 53,088 47,450