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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Tables) | 12 Months Ended
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Dec. 31, 2017
Equity [Abstract] |
Changes in Accumulated Balances of Other Comprehensive Income (Loss), Net of Tax | The following table summarizes the changes in accumulated balances of other comprehensive income (loss), net of taxes:
|  | Year ended December 31, 2016 |  |  | Year ended December 31, 2017 |
|  | Unrealized gains (losses) on available- for-sale marketable securities |  |  | Unrealized gains (losses) on cash flow hedges |  |  | Total |  |  | Unrealized gains (losses) on available-for- sale marketable securities |  |  | Unrealized gains (losses) on cash flow hedges |  |  | Total |
Beginning balance |  | $ | (427 | ) |  | $ | 8 |  |  | $ | (419 | ) |  | $ | (502 | ) |  | $ | 5 |  |  | $ | (497 | )
Other comprehensive income (loss) before reclassifications |  |  | (83 | ) |  |  | 140 |  |  |  | 57 |  |  |  | (83 | ) |  |  | 163 |  |  |  | 80 |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | 8 |  |  |  | (143 | ) |  |  | (135 | ) |  |  | (1 | ) |  |  | (168 | ) |  |  | (169 | )
Net current period other comprehensive income (loss) |  |  | (75 | ) |  |  | (3 | ) |  |  | (78 | ) |  |  | (84 | ) |  |  | (5 | ) |  |  | (89 | )
Ending balance |  | $ | (502 | ) |  | $ | 5 |  |  | $ | (497 | ) |  | $ | (586 | ) |  | $ | 0 |  |  | $ | (586 | )
Details about Reclassification out of Accumulated Other Comprehensive Income (Loss) Components | The following table provides details about reclassifications out of accumulated other comprehensive income (loss):
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  |  | Affected Line Item in the Statements of Operations
|  | Year ended December 31, |  |  |
|  | 2015 |  |  | 2016 |  |  | 2017 |  |  |
Unrealized gains on cash flow hedges |  | $ | — |  |  | $ | 4 |  |  | $ | 4 |  |  | Cost of revenues
|  |  | 91 |  |  |  | 132 |  |  |  | 162 |  |  | Research and development
|  |  | 5 |  |  |  | 12 |  |  |  | 10 |  |  | Sales and marketing
|  |  | 8 |  |  |  | 13 |  |  |  | 13 |  |  | General and administrative
|  |  | 104 |  |  |  | 161 |  |  |  | 189 |  |  | Total, before income taxes
|  |  | 11 |  |  |  | 18 |  |  |  | 21 |  |  | Income tax expense
|  |  | 93 |  |  |  | 143 |  |  |  | 168 |  |  | Total, net of income taxes
Unrealized gains (losses) on available-for-sale marketable securities |  |  | (78 | ) |  |  | (9 | ) |  |  | — |  |  | Financial income, net
|  |  | (8 | ) |  |  | (1 | ) |  |  | (1 | ) |  | Income tax benefit
|  |  | (70 | ) |  |  | (8 | ) |  |  | 1 |  |  | Total, net of income taxes
|  | $ | 23 |  |  | $ | 135 |  |  | $ | 169 |  |  | Total, net of income taxes

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- Definition Tabular disclosure of information about items reclassified out of accumulated other comprehensive income (loss). + References No definition available. + Details
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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
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