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Consolidated Statements of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Income Statement [Abstract] |  |  |  |
Sales | [1] | $ 82,738 | $ 75,622 | $ 73,298
Cost of sales |  | 48,659 | 44,835 | 43,865
Gross profit |  | 34,079 | 30,787 | 29,433
Operating expenses |  |  |  |
Research and development | [2] | 9,702 | 6,480 | 5,465
Sales and marketing |  | 5,651 | 4,418 | 3,818
General and administrative |  | 3,611 | 2,798 | $ 2,572
Contingent consideration expense (benefit) |  | (3,090) | 45 |
Total operating expenses |  | 15,874 | 13,741 | $ 11,855
Operating income |  | 18,205 | 17,046 | 17,578
Financial income, net |  | 220 | 263 | 404
Income before income taxes |  | 18,425 | 17,309 | 17,982
Income taxes |  | 1,905 | 2,704 | 905
Net income |  | $ 16,520 | $ 14,605 | $ 17,077
Income per share: |  |  |  |
Basic income per ordinary share (US$) |  | $ 2.273 | $ 2.033 | $ 2.404
Diluted income per ordinary share (US$) |  | $ 2.242 | $ 1.996 | $ 2.357
Weighted average number of ordinary shares used to compute basic income per share |  | 7,268,536 | 7,184,114 | 7,103,021
Weighted average number of ordinary shares used to compute diluted income per share |  | 7,367,984 | 7,318,906 | 7,246,032
[1] | Including sales to related parties in the amount of US$ 851 thousand, US$ 1,041 thousand and US$ 1,154 thousand in 2013, 2014 and 2015, respectively.
[2] | Including services from related parties in the amount of US$ 133 thousand, US$ 243 thousand and US$ 285 thousand in 2013, 2014 and 2015, respectively.

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