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Condensed Consolidated Statements Of Operations (USD $)
In Thousands, except Per Share data
 3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Revenue:        
Product revenue $ 6,753 $ 5,690 $ 12,936 $ 11,190
Government grants and cooperative agreements 0 245 436 467
Total revenue 6,753 5,935 13,372 11,657
Cost of product revenue 3,978 2,934 7,423 6,092
Gross profit 2,775 3,001 5,949 5,565
Operating expenses:        
Research and development 1,994 1,244 3,802 2,494
Selling, general and administrative 6,207 5,304 11,735 10,574
Amortization of intangible assets 51 0 101 0
Acquisition related costs, net 0 132 0 383
Total operating expenses 8,252 6,680 15,638 13,451
Loss from operations (5,477) (3,679) (9,689) (7,886)
Non-operating income (expense):        
Loss from revaluation of warrant liability (339) (653) (1,617) (1,615)
Foreign exchange gain (loss) (258) (975) 439 (1,073)
Interest expense (220) (227) (453) (232)
Other expense, net (19) (25) (3) (26)
Total non-operating expense (836) (1,880) (1,634) (2,946)
Net loss $ (6,313) $ (5,559) $ (11,323) $ (10,832)
Net loss per common share:        
Basic $ (0.13) $ (0.14) $ (0.24) $ (0.28)
Diluted $ (0.13) $ (0.14) $ (0.24) $ (0.28)
Weighted average common shares outstanding used for calculating net loss per common share:        
Basic 47,620 38,940 47,530 38,880
Diluted 47,620 38,940 47,530 38,880