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Consolidated Statements of Operations - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement [Abstract]      
Sales [1] $ 100,347 $ 82,738 $ 75,622
Cost of sales 61,796 48,659 44,835
Gross profit 38,551 34,079 30,787
Operating expenses      
Research and development [2] 12,663 9,702 6,480
Sales and marketing 6,423 5,651 4,418
General and administrative 3,969 3,611 2,798
Contingent consideration expense (benefit) (334) (3,090) 45
Total operating expenses 22,721 15,874 13,741
Operating income 15,830 18,205 17,046
Financial income, net 35 220 263
Income before income taxes 15,865 18,425 17,309
Income taxes 2,728 1,905 2,704
Net income $ 13,137 $ 16,520 $ 14,605
Income per share:      
Basic income per ordinary share (US$) $ 1.789 $ 2.273 $ 2.033
Diluted income per ordinary share (US$) $ 1.767 $ 2.242 $ 1.996
Weighted average number of ordinary shares used to compute basic income per share (in thousands) 7,343,696 7,268,536 7,184,114
Weighted average number of ordinary shares used to compute diluted income per share (in thousands) 7,435,181 7,367,984 7,318,906
[1] Including sales to related parties in the amount of US$ 1,041 thousand, US$ 1,154 thousand and US$ 762 thousand in 2014, 2015 and 2016, respectively.
[2] Including services from related parties in the amount of US$ 243 thousand, US$ 285 thousand and US$ 351 thousand in 2014, 2015 and 2016, respectively.