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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 | Dec. 31, 2011
Consolidated Statements of Operations |  |  |
Net sales | $ 331,749 | $ 516,020 | $ 979,135
Cost of sales | 228,607 | 300,887 | 504,801
Gross profit | 103,142 | 215,133 | 474,334
Operating expenses: |  |  |
Selling, general and administrative | 85,486 | 73,110 | 95,134
Research and development | 81,424 | 95,153 | 96,596
Amortization | 5,527 | 4,908 | 4,734
Restructuring | 1,485 | 3,813 | 1,288
Asset impairment | 1,220 | 1,335 | 584
Total operating expenses | 175,142 | 178,319 | 198,336
Other, net | (1,017) | (398) | (261)
Changes in contingent consideration | 829 |  |
Operating income (loss) | (71,812) | 37,212 | 276,259
Interest income | 1,200 | 2,476 | 3,776
Interest expense | (598) | (1,502) | (4,600)
Interest income (expense), net | 602 | 974 | (824)
Loss on extinguishment of debt |  |  | (3,349)
Income (loss) from continuing operations before income taxes | (71,210) | 38,186 | 272,086
Income tax provision (benefit) | (28,947) | 11,657 | 81,584
Income (loss) from continuing operations | (42,263) | 26,529 | 190,502
Discontinued operations: |  |  |
Income (loss) from discontinued operations before income taxes |  | 6,269 | (91,885)
Income tax provision (benefit) |  | 1,870 | (29,370)
Income (loss) from discontinued operations |  | 4,399 | (62,515)
Net income (loss) | $ (42,263) | $ 30,928 | $ 127,987
Basic: |  |  |
Continuing operations (in dollars per share) | $ (1.09) | $ 0.69 | $ 4.80
Discontinued operations (in dollars per share) |  | $ 0.11 | $ (1.57)
Income (loss) (in dollars per share) | $ (1.09) | $ 0.80 | $ 3.23
Diluted : |  |  |
Continuing operations (in dollars per share) | $ (1.09) | $ 0.68 | $ 4.63
Discontinued operations (in dollars per share) |  | $ 0.11 | $ (1.52)
Income (loss) (in dollars per share) | $ (1.09) | $ 0.79 | $ 3.11
Weighted average shares outstanding: |  |  |
Basic (in shares) | 38,807 | 38,477 | 39,658
Diluted (in shares) | 38,807 | 39,051 | 41,155

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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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