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Concentration of Risk, Segment and Geographic Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Concentration Of Risk Segment And Geographic Information [Abstract] |
Revenue by Geographical Region | Revenue attributed to the following geographic regions was as follows (in thousands) based on the location of the licensees:
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
United States |  | $ | 1,654 |  |  | $ | 3,822 |  |  | $ | 10,685 |
Europe |  |  | 50,936 |  |  |  | 1,642 |  |  |  | 44,662 |
Asia Pacific |  |  | 100 |  |  |  | 100 |  |  |  | 100 |
Total |  | $ | 52,690 |  |  | $ | 5,564 |  |  | $ | 55,447 |

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- Definition Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68060357&loc=d3e9038-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition Concentration of risk segment and geographic information. + References No definition available. + Details
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