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Consolidated Statements of Operations - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Product revenue, net $ 21,320 $ 14,149 $ 54,585 $ 37,722
Licensing revenue 163   538  
Total revenue, net 21,483 14,149 55,123 37,722
Less: Cost of goods sold 7,478 5,366 19,486 14,637
Gross margin 14,005 8,783 35,637 23,085
Operating expenses:        
Selling, general and administrative 26,727 19,270 77,522 60,949
Research and development 13,092 14,457 37,715 37,891
Total operating expenses 39,819 33,727 115,237 98,840
Operating loss (25,814) (24,944) (79,600) (75,755)
(Loss) gain on change in fair value of derivative liabilities (230) 4,466 (366) 11,870
Gain on extinguishment of debt       38,034
Interest expense, net (5,061) (4,876) (14,753) (13,565)
Other (expense) income, net (102) (247) (135) 3,994
Loss from operations before taxes (31,207) (25,601) (94,854) (35,422)
Benefit from (provision for) income taxes 532 (449) 1,541 (1,285)
Net loss (30,675) (26,050) (93,313) (36,707)
Preferred stock purchase option     (868)  
Preferred stock beneficial conversion features (1,646)   (32,987)  
Net loss applicable to common shareholders $ (32,321) $ (26,050) $ (127,168) $ (36,707)
Loss per share:        
Basic $ (0.18) $ (0.15) $ (0.71) $ (0.21)
Diluted $ (0.18) $ (0.17) $ (0.71) $ (0.25)
Weighted average shares:        
Basic 183,245 174,502 179,780 173,426
Diluted 183,245 175,141 179,780 174,305