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Other comprehensive income (loss) and accumulated other comprehensive items (Tables) | 12 Months Ended
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Dec. 31, 2016
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 table summarizes other comprehensive income (loss) and the changes in accumulated other comprehensive items, by component, for the years ended December 31, 2016, 2015, and 2014, respectively.
|  | Unrealized Gains/(Losses) On Marketable Securities |  | Foreign Currency Translation |  | Total Accumulated Other Comprehensive Items
Balance at December 31, 2013 |  | $ | 70 |  |  | $ | — |  |  | $ | 70 |
Other comprehensive loss before reclassifications |  | (457 | ) |  | (350 | ) |  | (807 | )
Amounts reclassified from other comprehensive items |  | — |  |  | — |  |  | — |
Other comprehensive loss |  | (457 | ) |  | (350 | ) |  | (807 | )
Balance at December 31, 2014 |  | $ | (387 | ) |  | $ | (350 | ) |  | $ | (737 | )
Other comprehensive loss before reclassifications |  | (202 | ) |  | (261 | ) |  | (463 | )
Amounts reclassified from other comprehensive items |  | — |  |  | — |  |  | — |
Other comprehensive loss |  | (202 | ) |  | (261 | ) |  | (463 | )
Balance at December 31, 2015 |  | $ | (589 | ) |  | $ | (611 | ) |  | $ | (1,200 | )
Other comprehensive income (loss) before reclassifications |  | 386 |  |  | (671 | ) |  | (285 | )
Amounts reclassified from other comprehensive items |  | — |  |  | — |  |  | — |
Other comprehensive income (loss) |  | 386 |  |  | (671 | ) |  | (285 | )
Balance at December 31, 2016 |  | $ | (203 | ) |  | $ | (1,282 | ) |  | $ | (1,485 | )

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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=66004124&loc=SL7669686-108580 + Details
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