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Commitments and Contingencies (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2004 | Dec. 31, 2002 | Aug. 20, 2015
Loss Contingencies |  |  |  |  |  |
Charge in general and administrative expenses | $ 0 | $ 1,000 | $ 2,000 |  |  |
Operating leases, rent expense | 5,800,000 | $ 5,800,000 | $ 5,300,000 |  |  |
Sublease income | 123,000 |  |  |  |  |
Gross Operating Lease Commitments |  |  |  |  |  |
2019 | 5,492,000 |  |  |  |  |
2020 | 4,081,000 |  |  |  |  |
2021 | 3,195,000 |  |  |  |  |
2022 | 2,365,000 |  |  |  |  |
2023 | 2,066,000 |  |  |  |  |
Thereafter | 1,187,000 |  |  |  |  |
Total | 18,386,000 |  |  |  |  |
Sublease Income |  |  |  |  |  |
2019 | (339,000) |  |  |  |  |
2020 | (344,000) |  |  |  |  |
2021 | (351,000) |  |  |  |  |
2022 | (357,000) |  |  |  |  |
2023 | (271,000) |  |  |  |  |
Thereafter | 0 |  |  |  |  |
Total | (1,662,000) |  |  |  |  |
Net Operating Lease Commitments |  |  |  |  |  |
2019 | 5,153,000 |  |  |  |  |
2020 | 3,737,000 |  |  |  |  |
2021 | 2,844,000 |  |  |  |  |
2022 | 2,008,000 |  |  |  |  |
2023 | 1,795,000 |  |  |  |  |
Thereafter | 1,187,000 |  |  |  |  |
Total | 16,724,000 |  |  |  |  |
Purchase Obligations |  |  |  |  |  |
2019 | 387,000 |  |  |  |  |
2020 | 84,000 |  |  |  |  |
2021 | 0 |  |  |  |  |
2022 | 0 |  |  |  |  |
2023 | 0 |  |  |  |  |
Thereafter | 0 |  |  |  |  |
Total | 471,000 |  |  |  |  |
Total Commitments |  |  |  |  |  |
Total Commitments, Due in 2019 | 5,540,000 |  |  |  |  |
Total Commitments, Due in 2020 | 3,821,000 |  |  |  |  |
Total Commitments, Due in 2021 | 2,844,000 |  |  |  |  |
Total Commitments, Due in 2022 | 2,008,000 |  |  |  |  |
Total Commitments, Due in 2023 | 1,795,000 |  |  |  |  |
Total Commitments, Due Thereafter | 1,187,000 |  |  |  |  |
Total Commitments | $ 17,195,000 |  |  |  |  |
Majority Shareholder | Travelzoo Europe Promissory Note |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Related party debt |  |  |  |  |  | $ 5,700,000.0
Stated percentage (percentage) |  |  |  |  |  | 7.00%
Travel Zoo Com Corporation |  |  |  |  |  |
Loss Contingencies |  |  |  |  |  |
Period for receiving shares under merger (in years) |  |  |  | 2 years | 2 years |
Number of shares exchanged under merger |  |  |  |  | 1 |

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