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CONSOLIDATED STATEMENTS OF INCOME (LOSS) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Revenues:      
Products $ 110,186 $ 136,793 $ 143,466
Services 86,399 79,773 78,426
Total revenues 196,585 216,566 221,892
Cost of revenues:      
Products 27,320 29,159 29,448
Services 8,375 9,041 10,284
Total cost of revenues 35,695 38,200 39,732
Gross profit 160,890 178,366 182,160
Operating expenses:      
Research and development, net 51,732 49,987 44,081
Sales and marketing 103,774 93,347 93,203
General and administrative 18,133 17,033 19,797
Total operating expenses 173,639 160,367 157,081
Operating income (loss) (12,749) 17,999 25,079
Financial income, net 5,741 5,867 5,802
Income (loss) before taxes on income (7,008) 23,866 30,881
Taxes on income 1,651 5,297 5,931
Net income (loss) $ (8,659) $ 18,569 $ 24,950
Basic net earnings (loss) per share $ (0.20) $ 0.40 $ 0.55
Diluted net earnings (loss) per share $ (0.20) $ 0.40 $ 0.53