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CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) shares in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
CONSOLIDATED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME |  |  |  |
Revenues |  | $ 245,893 | $ 232,434 | $ 249,682
Cost of goods sold |  | 172,889 | 163,662 | 176,256
Gross margin |  | 73,004 | 68,772 | 73,426
Operating costs and expenses: |  |  |  |
Selling |  | 9,986 | 8,149 | 8,709
General and administrative |  | 24,333 | 22,251 | 23,972
Engineering and development |  | 16,170 | 14,229 | 13,881
Business development |  | 428 | 569 |
Amortization of intangible assets |  | 3,204 | 2,644 | 2,714
Total operating costs and expenses |  | 54,121 | 47,842 | 49,276
Operating income |  | 18,883 | 20,930 | 24,150
Other expense (income): |  |  |  |
Interest expense |  | 6,449 | 6,023 | 6,435
Other expense (income), net |  | (369) | (514) | (908)
Total other expense (income) , net |  | 6,080 | 5,509 | 5,527
Income before income taxes |  | 12,803 | 15,421 | 18,623
Provision for income taxes |  | (3,725) | (4,347) | (4,763)
Net income |  | $ 9,078 | $ 11,074 | $ 13,860
Basic earnings per share: |  |  |  |
Earnings per share (in dollars per share) |  | $ 1.01 | $ 1.20 | $ 1.52
Basic weighted average common shares (in shares) |  | 9,011 | 9,228 | 9,145
Diluted earnings per share: |  |  |  |
Earnings per share (in dollars per share) |  | $ 1.00 | $ 1.20 | $ 1.51
Diluted weighted average common shares (in shares) |  | 9,105 | 9,238 | 9,165
Net income |  | $ 9,078 | $ 11,074 | $ 13,860
Other comprehensive income: |  |  |  |
Foreign currency translation adjustment |  | (1,989) | (4,334) | (5,601)
Change in accumulated loss on derivatives |  | (3) | (25) | (43)
Pension adjustments | [1] | (134) | 165 | (663)
Comprehensive income |  | $ 6,952 | $ 6,880 | $ 7,553
[1] | Net of tax of ($78), $114 and ($460) for the periods ending December 31, 2016, 2015 and 2014, respectively.

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- Definition The aggregate total amount of expenses related to the Engineering of products or services not directly associated with the manufacture or sale of a product line, and 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. + References No definition available. + Details
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