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Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Revenue: |  |  |  |
Product revenue | $ 8,252 | $ 7,770 | $ 26,167 | $ 20,706
Government grants and cooperative agreements | 0 | 1,479 | 91 | 1,915
Total revenue | 8,252 | 9,249 | 26,258 | 22,621
Cost of product revenue | 4,411 | 4,726 | 15,499 | 12,329
Gross profit | 3,841 | 4,523 | 10,759 | 10,292
Operating expenses: |  |  |  |
Research and development | 1,903 | 1,814 | 5,439 | 5,616
Selling, general and administrative | 6,219 | 5,380 | 18,871 | 17,115
Amortization of intangible assets | 50 | 51 | 151 | 152
Total operating expenses | 8,172 | 7,245 | 24,461 | 22,883
Loss from operations | (4,331) | (2,722) | (13,702) | (12,591)
Non-operating income (expense), net: |  |  |  |
Revaluation of warrant liability | 873 | 5,439 | 86 | 3,822
Foreign exchange gain (loss) | 206 | (41) | (212) | 394
Interest expense | (136) | (394) | (410) | (847)
Other income (expense), net | (72) | (22) | 37 | (25)
Total non-operating income (expense), net | 871 | 4,982 | (499) | 3,344
Net income (loss) | $ (3,460) | $ 2,260 | $ (14,201) | $ (9,247)
Net income (loss) per common share: |  |  |  |
Basic | $ (0.06) | $ 0.05 | $ (0.26) | $ (0.19)
Diluted | $ (0.08) | $ 0.05 | $ (0.26) | $ (0.19)
Weighted average common shares outstanding used for calculating net income (loss) per common share: |  |  |  |
Basic | 54,875 | 47,710 | 54,130 | 47,600
Diluted | 55,377 | 48,820 | 54,130 | 47,600

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- Definition The increase (decrease) during the period to reflect the change in fair value of unrealized and/or realized gains or losses, recognized in earnings, related to the warrant liability. The non-cash net impact of the mark-to-market of the outstanding warrant is based on the binomial model valuation. + References No definition available. + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Paragraph 5A -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6386349&loc=d3e3636-108311 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 40 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 128 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 07-4 -Paragraph 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
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