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Accumulated Other Comprehensive Income (Tables) | 12 Months Ended
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Dec. 31, 2018
Accumulated Other Comprehensive Income |
Summary of changes in accumulated other comprehensive income |
|  | Unrealized |  |  |  |  |  |
|  | Gain (Loss) on |  |  |  |  |  |
|  | Marketable |  | Foreign |  |  |
|  | Securities |  | Currency Items |  | Total
|  | (In thousands)
Balance at December 31, 2017 |  | $ | (32) |  | $ | 2,596 |  | $ | 2,564
Other comprehensive gain |  |  | 19 |  |  | — |  |  | 19
Balance at December 31, 2018 |  | $ | (13) |  | $ | 2,596 |  | $ | 2,583

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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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