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Basis of Presentation and Summary of Significant Accounting Policies - Narrative (Details) supplier in Thousands, ¥ in Millions, member in Millions |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Jun. 16, 2020 USD ($) | Jun. 16, 2020 JPY (¥) | May 31, 2023 USD ($) | Jul. 31, 2022 USD ($) | Jan. 31, 2022 USD ($) | Jan. 31, 2020 | Mar. 31, 2020 USD ($) | Dec. 31, 2023 USD ($) supplier member | Dec. 31, 2023 JPY (¥) supplier member | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2024 USD ($)
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of members | member |  |  |  |  |  |  |  | 30.0 | 30.0 |  |  |
Number of travel supplier partnerships | supplier |  |  |  |  |  |  |  | 5 | 5 |  |  |
Proceeds from royalties received |  |  |  |  |  |  |  | $ 71,000,000 |  | $ 25,000,000 |  |
Deferred revenue |  |  |  |  |  |  |  | 2,000,000 |  | 2,200,000 |  |
Voucher liability, current |  |  |  |  |  |  |  | 5,200,000 |  | 8,100,000 |  |
Refund liability |  |  |  |  |  |  |  | 268,000 |  | 1,300,000 |  |
Merchant payables |  |  |  |  |  |  |  | 20,622,000 |  | 32,574,000 |  |
Goodwill impairments |  |  |  |  |  |  |  | 0 |  | 0 |  |
Advertising costs |  |  |  |  |  |  |  | 8,100,000 |  | 6,400,000 |  |
Total foreign currency transaction gain (loss) |  |  |  |  |  |  |  | 62,000 |  | (232,000) |  |
Impairment of software |  |  |  |  |  |  |  | $ 0 |  | 0 |  |
Forecast |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Annual membership fee charged |  |  |  |  |  |  |  |  |  |  |  | $ 40
Minimum | Office equipment and furnishings |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 3 years |  |  |  |
Minimum | Computer hardware and software |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 3 years |  |  |  |
Minimum | Capitalized internal-use software and website development |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 3 years |  |  |  |
Maximum | Office equipment and furnishings |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 5 years |  |  |  |
Maximum | Computer hardware and software |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 5 years |  |  |  |
Maximum | Capitalized internal-use software and website development |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  | 5 years |  |  |  |
Other Income (Loss) |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Total foreign currency transaction gain (loss) |  |  |  |  |  |  |  | $ 65,000 |  | 72,000 |  |
Jack's Flight Club |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Advertising and marketing cost |  |  |  |  |  |  |  | 1,500,000 |  | 545,000 |  |
Travelzoo North America |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  |  |  |  | 1,500,000 |  | 1,200,000 |  |
Travelzoo Europe |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  |  |  |  | 569,000 |  | 981,000 |  |
New Initiatives |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Advertising costs |  |  |  |  |  |  |  | $ 238,000 |  | $ 0 |  |
Board of Directors Chairman |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by related party |  |  |  |  |  |  |  | 40.20% |  | 50.30% |  |
Brother Of Board Of Directors Chairman |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by related party |  |  |  |  |  |  |  | 3.80% |  |  |  |
CANADA |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Job retention fund |  |  |  |  |  |  |  |  |  | $ 164,000 |  |
Europe |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Job retention fund |  |  |  |  |  |  |  | $ 0 |  | 0 |  |
Government Assistance, CARES Act |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from government funding |  |  | $ 205,000 | $ 494,000 | $ 1,200,000 |  |  | 205,000 |  | 1,700,000 |  |
Discontinued Operations, Disposed of by Sale | Travelzoo Japan |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Interest free loan amount | $ 430,000 | ¥ 46.0 |  |  |  |  |  | 430,000 | ¥ 46.0 |  |  |
Debt paid off |  |  |  |  |  |  |  |  |  |  | $ 133,000 |
Travelzoo Japan |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from royalties received |  |  |  |  |  |  |  | $ 36,000 |  | 0 |  |
Travelzoo Japan | Royalty Agreement Terms |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  |  |  |  |  | 5 years | 5 years |  |  |
Travelzoo Singapore |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from royalties received |  |  |  |  |  |  |  | $ 35,000 |  | 25,000 |  |
Jack's Flight Club |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of members | member |  |  |  |  |  |  |  | 2.4 | 2.4 |  |  |
Percentage of ownership before transaction (up to) |  |  |  |  |  | 60.00% |  |  |  |  |  |
Goodwill impairments |  |  |  |  |  |  | $ 2,100,000 |  |  | $ 0 |  |

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