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CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Net revenues: |  |
Product | $ 115,126 | $ 100,271
Service | 56,467 | 49,070
Contract | 61,012 | 80,312
Total net revenues | 232,605 | 229,653
Costs of sales: |  |
Product | 85,850 | 73,976
Service | 39,626 | 35,647
Contract | 54,299 | 73,830
Total costs of sales | 179,775 | 183,453
Gross margin | 52,830 | 46,200
Operating expenses: |  |
Selling, general and administrative | 38,171 | 31,440
Research and development | 13,814 | 11,581
Amortization of identifiable intangible assets | 966 | 966
Total operating expenses | 52,951 | 43,987
Operating (loss) income from continuing operations | (121) | 2,213
Other income, net | 629 | 1,316
Interest (expense) income, net | (121) | 121
Income from continuing operations before provision for income taxes | 387 | 3,650
Provision for income taxes | (3,997) | (1,147)
(Loss) income from continuing operations | (3,610) | 2,503
Discontinued operations |  |
Income (loss) on discontinued operations (net of tax) | 224 | (720)
Net (loss) income | $ (3,386) | $ 1,783
Basic Earnings per Share: |  |
(Loss) Income from continuing operations (in dollars per share) | $ (0.23) | $ 0.16
Income (Loss) from discontinued operations (in dollars per share) | 0.01 | (0.05)
Net (loss) income (in dollars per share) | (0.22) | 0.11
Diluted Earnings per Share: |  |
(Loss) Income from continuing operations (in dollars per share) | (0.23) | 0.16
Income (Loss) from discontinued operations (in dollars per share) | 0.01 | (0.05)
Net (loss) income (in dollars per share) | $ (0.22) | $ 0.11
Weighted average shares outstanding |  |
Basic (in shares) | 15,949 | 15,675
Diluted (in shares) | 15,949 | 15,738

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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 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: 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 + Details
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