Segment Reporting and Significant Customer Information - Long Lived Assets by Business Segment (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 652	$ 657
Total assets excluding discontinued operations	59,106	67,263
Elimination
Revenues from External Customers and Long-Lived Assets
Long-lived assets	0	0
Total assets excluding discontinued operations	(75,000)	(68,687)
Travelzoo North America | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	244	375
Total assets excluding discontinued operations	96,108	97,693
Travelzoo Europe | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	90	86
Total assets excluding discontinued operations	17,958	19,253
Jack’s Flight Club | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	0	0
Total assets excluding discontinued operations	19,601	18,737
New Initiatives | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	318	196
Total assets excluding discontinued operations	$ 439	$ 267