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Summary of Significant Accounting Policies - Narrative (Details)
 6 Months Ended
Oct. 31, 2023
USD ($)
Jun. 30, 2024
USD ($)
member
supplier
Jan. 01, 2024
USD ($)
Dec. 31, 2023
USD ($)
Related Party Transaction        
Number of members | member   30,000,000    
Number of travel supplier partnerships | supplier   5,000    
Annual membership fee charged     $ 40  
Deferred revenue   $ 3,200,000    
Voucher liability, current   4,200,000   $ 5,200,000
Customer voucher refund liability   177,000   268,000
Merchant payables   16,708,000   20,622,000
Working capital   4,300,000    
Goodwill impairments $ 0 $ 0    
Travelzoo Japan | Royalty Agreement Terms        
Related Party Transaction        
License agreement, term   5 years    
Jack’s Flight Club        
Related Party Transaction        
Deferred revenue   $ 2,000,000.0   1,500,000
Deferred revenue recognized   1,200,000    
Travelzoo North America And Travelzoo Europe        
Related Party Transaction        
Deferred revenue   1,200,000   $ 569,000
Deferred revenue recognized   $ 532,000    
Board of Directors Chairman        
Related Party Transaction        
Ownership percentage held by related party   40.80%    
Holger Bartel        
Related Party Transaction        
Ownership percentage held by related party   2.50%