Segment Reporting and Significant Customer Information - Long Lived Assets by Business Segment (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Revenues from External Customers and Long-Lived Assets
Long-lived assets	$ 532	$ 578
Total assets excluding discontinued operations	54,736	55,381
Elimination
Revenues from External Customers and Long-Lived Assets
Long-lived assets	0	0
Total assets excluding discontinued operations	(87,058)	(87,181)
Travelzoo North America | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	129	152
Total assets excluding discontinued operations	96,599	96,865
Travelzoo Europe | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	113	106
Total assets excluding discontinued operations	22,201	22,655
Jack’s Flight Club | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	0	0
Total assets excluding discontinued operations	19,474	19,472
New Initiatives | Operating Segments
Revenues from External Customers and Long-Lived Assets
Long-lived assets	290	320
Total assets excluding discontinued operations	$ 3,520	$ 3,570