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Summary of Significant Accounting Policies - Narrative (Details) supplier in Thousands, ¥ in Millions, shares in Millions, member in Millions				1 Months Ended				3 Months Ended				6 Months Ended	9 Months Ended			12 Months Ended
	Dec. 30, 2022 USD ($)	Dec. 28, 2022 shares	Oct. 31, 2022 USD ($)	Oct. 31, 2023 payment	May 31, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jan. 31, 2022 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2023 USD ($)	Sep. 30, 2023 USD ($) member supplier	Sep. 30, 2023 JPY (¥) member supplier	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction
Number of members | member													30	30
Number of travel supplier partnerships | supplier													5	5
Working capital								$ 8,000,000					$ 8,000,000
Merchant payables								23,717,000					23,717,000			$ 32,574,000
Cash and cash equivalents								15,901,000					15,901,000			18,693,000
Deferred revenue								2,800,000					2,800,000			1,200,000
Voucher liability, current								5,900,000					5,900,000			8,100,000
Customer voucher refund liability								421,000					421,000			1,300,000
Goodwill impairments			$ 0										$ 0
Azzurro Brands Inc.
Related Party Transaction
Interest repaid								$ 190,000				$ 285,000
Azzurro Brands Inc. | Subsequent Event
Related Party Transaction
Number of principal installment payments | payment				5,000,000
Increased annual interest rate				16.00%
Private Placement
Related Party Transaction
Number of shares sold | shares		3.4
Sale of stock, cash	$ 1,000,000
Sale of stock, promissory note	$ 4,800,000															$ 4,800,000
Board of Directors Chairman
Related Party Transaction
Ownership percentage held by related party								48.00%					48.00%			50.30%
Brother Of Board Of Directors Chairman
Related Party Transaction
Ownership percentage held by related party								3.60%					3.60%
Travelzoo Europe
Related Party Transaction
Deferred revenue								$ 1,800,000					$ 1,800,000
Travelzoo North America
Related Party Transaction
Deferred revenue								1,000,000					1,000,000
Government Assistance, CARES Act
Related Party Transaction
Proceeds from government funding					$ 205,000	$ 494,000	$ 1,200,000
CANADA
Related Party Transaction
Job retention fund										$ 10,000			0		$ 164,000
North America
Related Party Transaction
Deferred revenue recognized													981,000
Europe
Related Party Transaction
Deferred revenue recognized													$ 886,000
Jack’s Flight Club
Related Party Transaction
Number of members | member													2	2
Goodwill impairments											$ 2,100,000					$ 0
Travelzoo Australia
Related Party Transaction
Royalty recognized								$ 9,000		$ 8,000			$ 26,000		$ 18,000
Travelzoo Japan
Related Party Transaction
Royalty recognized									$ 9,000				13,000			$ 0
Discontinued Operations, Disposed of by Sale | Travelzoo Japan
Related Party Transaction
Interest free loan amount													430,000	¥ 46
Debt paid off													$ 113,000				$ 133,000
Travelzoo Japan | Royalty Agreement Terms
Related Party Transaction
Term													5 years	5 years
Travelzoo Japan | Loan Issued to Travelzoo Japan
Related Party Transaction
Term																	5 years

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