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SHAREHOLDERS' EQUITY (Schedule Of Equity-Based Compensation Expense) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Total share-based compensation expense | $ 1,980 | $ 1,203 | $ 1,071
Cost of Revenue [Member] |  |  |
Total share-based compensation expense | 42 | 54 | 30
Research And Development Expense [Member] |  |  |
Total share-based compensation expense | 313 | 229 | 151
Selling And Marketing Expense [Member] |  |  |
Total share-based compensation expense | 640 | 292 | 369
General And Administrative Expense [Member] |  |  |
Total share-based compensation expense | $ 985 | $ 628 | $ 521

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