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Segment and Geographic Information (Tables) | 12 Months Ended
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Dec. 31, 2018
Segment Reporting [Abstract] |
Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas | The following table summarizes information about geographic areas (in thousands):
| United States |  | Europe |  | Greater China |  | Other |  | Total
Year Ended December 31, 2018 |  |  |  |  |  |  |  |  |
Revenue | $ | 231,760 |  |  | $ | 307,965 |  |  | $ | 126,109 |  |  | $ | 140,504 |  |  | $ | 806,338 |
Long-lived assets | 67,156 |  |  | 23,948 |  |  | 1,482 |  |  | 2,735 |  |  | $ | 95,321 |
Year Ended December 31, 2017 |  |  |  |  |  |  |  |  |
Revenue | $ | 180,248 |  |  | $ | 328,826 |  |  | $ | 108,738 |  |  | $ | 148,271 |  |  | $ | 766,083 |
Long-lived assets | 53,983 |  |  | 22,437 |  |  | 1,594 |  |  | 2,525 |  |  | $ | 80,539 |
Year Ended December 31, 2016 |  |  |  |  |  |  |  |  |
Revenue | $ | 142,380 |  |  | $ | 230,311 |  |  | $ | 66,179 |  |  | $ | 90,645 |  |  | $ | 529,515 |
Long-lived assets | 40,404 |  |  | 12,981 |  |  | 994 |  |  | 1,932 |  |  | $ | 56,311 |

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- Definition Tabular disclosure of information concerning material long-lived assets (excluding financial instruments, customer relationships with financial institutions, mortgage and other servicing rights, deferred policy acquisition costs, and deferred taxes assets) located in identified geographic areas and/or the amount of revenue from external customers attributed to that country from which revenue is material. An entity may also provide subtotals of geographic information about groups of countries. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e9038-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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