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Note 10 - Accumulated Other Comprehensive Income (Loss) (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
|  | Year ended December 31, 2017 |  |  | Year ended December 31, 201 8 |
|  | 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 |  | $ | (502 | ) |  | $ | 5 |  |  | $ | (497 | ) |  | $ | (586 | ) |  | $ | — |  |  | $ | (586 | )
Other comprehensive income (loss) before reclassifications |  |  | (83 | ) |  |  | 163 |  |  |  | 80 |  |  |  | (521 | ) |  |  | (380 | ) |  |  | (901 | )
Amounts reclassified from accumulated other comprehensive income (loss) |  |  | (1 | ) |  |  | (168 | ) |  |  | (169 | ) |  |  | 61 |  |  |  | 312 |  |  |  | 373 |
Net current period other comprehensive income (loss) |  |  | (84 | ) |  |  | (5 | ) |  |  | (89 | ) |  |  | (460 | ) |  |  | (68 | ) |  |  | (528 | )
Ending balance |  | $ | (586 | ) |  | $ | — |  |  | $ | (586 | ) |  | $ | (1,046 | ) |  | $ | (68 | ) |  | $ | (1,114 | )
Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about Accumulated Other Comprehensive Income (Loss) Components |  | Amount Reclassified from Accumulated Other Comprehensive Income (Loss) |  |  | Affected Line Item in the Statements of Income
|  | Year ended December 31, |  |  |
|  | 2016 |  |  | 2017 |  |  | 2018 |  |  |
Unrealized gains (losses) on cash flow hedges |  | $ | 4 |  |  | $ | 4 |  |  | $ | (7 | ) |  | Cost of revenues
|  |  | 132 |  |  |  | 162 |  |  |  | (308 | ) |  | Research and development
|  |  | 12 |  |  |  | 10 |  |  |  | (13 | ) |  | Sales and marketing
|  |  | 13 |  |  |  | 13 |  |  |  | (26 | ) |  | General and administrative
|  |  | 161 |  |  |  | 189 |  |  |  | (354 | ) |  | Total, before income taxes
|  |  | 18 |  |  |  | 21 |  |  |  | (42 | ) |  | Income tax expense
|  |  | 143 |  |  |  | 168 |  |  |  | (312 | ) |  | Total, net of income taxes
Unrealized gains (losses) on available-for-sale marketable securities |  |  | (9 | ) |  |  | — |  |  |  | (67 | ) |  | Financial income, net
|  |  | (1 | ) |  |  | (1 | ) |  |  | (6 | ) |  | Income tax benefit
|  |  | (8 | ) |  |  | 1 |  |  |  | (61 | ) |  | Total, net of income taxes
|  | $ | 135 |  |  | $ | 169 |  |  | $ | (373 | ) |  | 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669686-108580 + Details
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