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Accumulated Other Comprehensive Income (Tables) | 6 Months Ended
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Jun. 30, 2017
Accumulated Other Comprehensive Income |
Summary of changes in accumulated other comprehensive income |
|  | Unrealized Gain (Loss) on Marketable Securities |  | Foreign Currency Items |  | Total |
|  | (In thousands) |
Balance at December 31, 2016 |  | $ | (55 | ) | $ | 2,596 |  | $ | 2,541 |
Other comprehensive gain |  | 36 |  | — |  | 36 |
Balance at June 30, 2017 |  | $ | (19 | ) | $ | 2,596 |  | $ | 2,577 |

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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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