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Shareholders' Equity (Details 3) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Share-based compensation charges | [1] | $ 2,216 | $ 2,471 | $ 1,409
Cost of revenues [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Share-based compensation charges | [1] | 189 | 118 | 33
Research and development, net [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Share-based compensation charges | [1] | 473 | 625 | 529
Sales and marketing, net [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Share-based compensation charges | [1] | 499 | 199 | 380
General and administrative [Member] |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] |  |  |  |
Share-based compensation charges | [1] | $ 1,055 | $ 1,529 | $ 467
[1] | Including $1,335, $1,331 and $342 of compensation cost related to RSUs for the year ended December 31, 2017, 2016 and 2015, respectively.

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