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Summary of Significant Accounting Policies - Narrative (Details)		6 Months Ended
	Oct. 31, 2024 USD ($)	Jun. 30, 2025 USD ($) member	Dec. 31, 2024 USD ($)	Jan. 01, 2024 USD ($)
Related Party Transaction
Number of members | member		30,000,000
Annual membership fee charged				$ 40
Deferred revenue		$ 8,500,000
Voucher liability, current		3,100,000	$ 4,100,000
Customer voucher refund liability		215,000	144,000
Merchant payables		12,419,000	16,294,000
Goodwill impairments	$ 0	0
Working capital		11,000,000.0
Jack's Flight Club
Related Party Transaction
Deferred revenue		2,400,000	2,000,000
Deferred revenue recognized		1,600,000
Travelzoo North America And Travelzoo Europe
Related Party Transaction
Deferred revenue		6,000,000	$ 4,500,000
Deferred revenue recognized		$ 3,300,000
Board of Directors Chairman
Related Party Transaction
Ownership percentage held by related party		36.70%

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