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Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, ¥ in Millions, shares in Millions, member in Millions |  |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 30, 2022 USD ($) $ / shares shares | Jun. 16, 2020 USD ($) | Jun. 16, 2020 JPY (¥) | May 05, 2020 USD ($) | Apr. 24, 2020 USD ($) | Jul. 31, 2022 USD ($) | Mar. 31, 2020 | Apr. 30, 2019 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2022 USD ($) member | Dec. 31, 2021 USD ($) | Dec. 31, 2021 JPY (¥) | Dec. 31, 2020 USD ($) | Dec. 23, 2020
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of members | member |  |  |  |  |  |  |  |  |  | 30.0 |  |  |  |
Working capital |  |  |  |  |  |  |  |  |  | $ 11,900,000 |  |  |  |
Cash used in operating activities |  |  |  |  |  |  |  |  |  | 23,121,000 | $ 8,083,000 |  |  |
Merchant payables |  |  |  |  |  |  |  |  |  | 32,574,000 | 68,678,000 |  |  |
Cash and cash equivalents value |  |  |  |  |  |  |  |  |  | 18,693,000 | 43,815,000 |  |  |
Deferred revenue |  |  |  |  |  |  |  |  |  | 2,200,000 |  |  |  |
Deferred revenue, revenue recognized in period |  |  |  |  |  |  |  |  |  | 463,000 |  |  |  |
Voucher liability, current |  |  |  |  |  |  |  |  |  | 8,100,000 | 17,200,000 |  |  |
Refund liability |  |  |  |  |  |  |  |  |  | 1,300,000 | 5,200,000 |  |  |
Advertising costs |  |  |  |  |  |  |  |  |  | 6,400,000 | 3,700,000 |  |  |
Marketing and advertising expense |  |  |  |  |  |  |  |  |  | 545,000 | 221,000 |  |  |
Total foreign currency transaction gain (loss) |  |  |  |  |  |  |  |  |  | (232,000) | 373,000 |  |  |
Impairment of software |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Private Placement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of shares sold (in shares) | shares | 3.4 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock (in dollars per share) | $ / shares | $ 4.45 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, total consideration | $ 15,200,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, cash | 1,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, promissory note | $ 4,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Sale of stock, accrued interest (as a percent) | 12.00% |  |  |  |  |  |  |  |  |  |  |  |  |
Board of Directors Chairman |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage held by related party |  |  |  |  |  |  |  |  |  | 50.30% |  |  |  |
Computer hardware and software | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Computer hardware and software | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Capitalized internal-use software and website development | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Capitalized internal-use software and website development | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  |  |  | 5 years |  |  |  |
Office equipment and office furniture | Minimum |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimated useful lives (in years) |  |  |  |  |  |  |  |  |  | 3 years |  |  |  |
Office equipment and office furniture | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |
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) |  |  |  |  |  |  |  |  |  | $ 72,000 | 31,000 |  |  |
Travelzoo Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  |  |  |  |  |  | 981,000 | 1,300,000 |  |  |
Travelzoo North America |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred revenue |  |  |  |  |  |  |  |  |  | $ 1,200,000 | 473,000 |  |  |
Jack's Flight Club |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of members | member |  |  |  |  |  |  |  |  |  | 1.9 |  |  |  |
CANADA |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Job retention fund |  |  |  |  |  |  |  |  |  | $ 164,000 | 400,000 |  |  |
Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Job retention fund |  |  |  |  |  |  |  |  |  |  | 31,000 |  |  |
Small Business Administration (SBA), CARES Act, Paycheck Protection Program |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  | 2 years |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of unsecured debt |  |  |  | $ 535,000 | $ 3,100,000 |  |  |  | $ 1,200,000 |  |  |  |  |
Small Business Administration (SBA), Economic Security Act |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from issuance of unsecured debt |  |  |  |  |  | $ 494,000 |  |  |  |  |  |  |  |
Weekengo |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage |  |  |  |  |  |  |  |  |  |  |  |  |  | 33.70%
Payments to acquire equity method investments |  |  |  |  |  |  |  | $ 196,000 |  |  |  |  |  |
Other income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | $ 468,000 |
Weekengo | Technology-Based Intangible Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity method investment, related identifiable intangible assets |  |  |  |  |  |  |  |  |  | 200,000 |  |  |  |
Weekengo, Original Investment Agreement |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire equity method investments |  |  |  |  |  |  |  |  |  | 2,900,000 |  |  |  |
Travelzoo Japan | Discontinued Operations, Disposed of by Sale |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  | 3 years | 3 years |  |  |  |  |  |  |  |  |  |  |
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 |  |  |  |  |  |  |  |  |  |  | $ 9,000 |  |  |
Travelzoo Japan | Royalty Agreement Terms |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  |  |  |  | 5 years |  |  |  |  |  |  |
Travelzoo Japan | Loan Issued To Travelzoo Japan |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Term (in years) |  |  |  |  |  |  |  |  |  |  | 3 years | 3 years |  |
Travelzoo Singapore |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from royalties received |  |  |  |  |  |  |  |  |  | $ 25,000 | $ 3,000 |  |  |

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