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Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012
Income Statement [Abstract] |  |
Product revenue | $ 2,341 | $ 6,782
Contract revenue | 602 | 1,583
Development revenue | 2,909 | 0
Total revenue | 5,852 | 8,365
Cost of product revenue | 1,518 | 6,085
Cost of contract revenue | 283 | 839
Total cost of revenue | 1,801 | 6,924
Gross margin | 4,051 | 1,441
Research and development expense | 10,267 | 12,851
Sales, marketing, general and administrative expense | 8,792 | 11,252
Impairment of intangible assets | 277 | 284
Gain on disposal of fixed assets | (35) | (79)
Gain on sale of previously reserved inventory | (156) | (212)
Total operating expenses | 19,145 | 24,096
Loss from operations | (15,094) | (22,655)
Change in warrant liability | 1,801 | 0
Other income (expense) | 115 | (38)
Net loss | $ (13,178) | $ (22,693)
Net loss per share - basic and diluted | $ (0.47) | $ (1.05)
Weighted-average shares outstanding - basic and diluted | 28,025 | 21,595

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