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Other comprehensive income (loss) and accumulated other comprehensive items (Tables) | 12 Months Ended
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Dec. 31, 2014
Other comprehensive income (loss) and accumulated other comprehensive items |
Summary of other comprehensive income (loss) and the changes in accumulated other comprehensive items |
|  | Unrealized Gains On Marketable Securities |  | Foreign Currency Translation |  | Total Accumulated Other Comprehensive Items |
Balance at December, 2011 |  | $ | — |  | $ | — |  | $ | — |
Other comprehensive income/(loss) before reclassifications |  |  | — |  |  | — |  |  | — |
Amounts reclassified from other comprehensive items |  |  | — |  |  | — |  |  | — |
Other comprehensive income/(loss) |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2012 |  | $ | — |  | $ | — |  | $ | — |
Other comprehensive income before reclassifications |  |  | 70 |  |  | — |  |  | 70 |
Amounts reclassified from other comprehensive items |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive income |  |  | 70 |  |  | — |  |  | 70 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2013 |  | $ | 70 |  | $ | — |  | $ | 70 |
Other comprehensive loss before reclassifications |  |  | (457 | ) |  | (350 | ) |  | (807 | )
Amounts reclassified from other comprehensive items |  |  | — |  |  | — |  |  | — |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other comprehensive loss |  |  | (387 | ) |  | (350 | ) |  | (737 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance at December 31, 2014 |  | $ | (387 | ) | $ | (350 | ) | $ | (737 | )
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

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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=36458714&loc=SL7669686-108580 + Details
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