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Discontinued Operations - Summary of Cash Flows (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Discontinued Operations, Disposed of by Sale | Travelzoo Singapore    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Net cash used in operating activities $ (4) $ (18)