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Other comprehensive income (loss) and accumulated other comprehensive items - (Tables) | 6 Months Ended
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Jun. 30, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract] |
Summary of other comprehensive income (loss) and the changes in accumulated other comprehensive items | The following tables summarize other comprehensive income (loss) and the changes in accumulated other comprehensive items for the three and six months ended June 30, 2019:
|  | Unrealized Gains/(Losses) On Marketable Securities, net of tax |  | Foreign Currency Translation |  | Total Accumulated Other Comprehensive Items
Balance at March 31, 2019 |  | $ | 90 |  |  | $ | 715 |  |  | $ | 805 |
Other comprehensive income before reclassifications |  | 839 |  |  | 278 |  |  | 1,117 |
Amounts reclassified from other comprehensive items |  | — |  |  | — |  |  | — |
Other comprehensive income |  | 839 |  |  | 278 |  |  | 1,117 |
Balance at June 30, 2019 |  | $ | 929 |  |  | $ | 993 |  |  | $ | 1,922 |
|  | Unrealized Gains/(Losses) On Marketable Securities, net of tax |  | Foreign Currency Translation |  | Total Accumulated Other Comprehensive Items
Balance at December 31, 2018 |  | $ | 31 |  |  | $ | 1,431 |  |  | $ | 1,462 |
Other comprehensive income (loss) before reclassifications |  | 898 |  |  | (438 | ) |  | 460 |
Amounts reclassified from other comprehensive items |  | — |  |  | — |  |  | — |
Other comprehensive income (loss) |  | 898 |  |  | (438 | ) |  | 460 |
Balance at June 30, 2019 |  | $ | 929 |  |  | $ | 993 |  |  | $ | 1,922 |

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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=118930883&loc=SL7669686-108580 + Details
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