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Segment Reporting and Significant Customer Information - Assets by Segment (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Revenue for each segment recognized based on customer location |  |
Long-lived assets | $ 1,347 | $ 2,861
Total assets | 102,170 | 50,577
Intersegment revenues |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 0 | 0
Total assets | (67,515) | (90,830)
Travelzoo North America | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 1,123 | 2,598
Total assets | 138,020 | 66,803
Travelzoo Europe | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 224 | 263
Total assets | 31,659 | $ 74,604
Jack's Flight Club | Operating Segments |  |
Revenue for each segment recognized based on customer location |  |
Long-lived assets | 0 |
Total assets | $ 6 |

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- Definition Long-Lived Assets, Excluding Discontinued Operations + References No definition available. + Details
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- Definition Long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 + Details
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