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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.