STOCK CAPITAL (Schedule of Recognized Stock-Based Compensation Expense) (Details) - USD ($) $ in Thousands |
3 Months Ended | |
---|---|---|
Mar. 31, 2019 |
Mar. 31, 2018 |
|
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
Total stock-based compensation expense | $ 9,704 | $ 6,849 |
Cost of revenues [Member] | ||
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
Total stock-based compensation expense | 1,354 | 924 |
Research and development [Member] | ||
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
Total stock-based compensation expense | 3,490 | 2,382 |
Selling and marketing [Member] | ||
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
Total stock-based compensation expense | 2,404 | 2,204 |
General and administrative [Member] | ||
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] | ||
Total stock-based compensation expense | $ 2,456 | $ 1,339 |