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Discontinued Operations - Narrative (Details) $ in Thousands, ¥ in Millions				3 Months Ended								12 Months Ended
	Aug. 24, 2020	Jun. 16, 2020 USD ($)	Jun. 16, 2020 JPY (¥)	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Severance and disposal costs							$ 1,600
Total operating expenses				$ 10,585	$ 12,066	$ 11,496	$ 22,964	$ 19,354	$ 17,589	$ 19,781	$ 19,725	$ 57,111	$ 76,449
Disposal Group, Not Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cost of revenue												64	135
Total operating expenses												$ 7	$ 204
Discontinued Operations, Disposed of by Sale | Travelzoo Japan
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage sold		100.00%	100.00%
Gain (loss) on disposition of business		$ 128
Duration of royalty payments		5 years	5 years
Interest free loan amount		$ 430	¥ 46.0
Term		3 years	3 years
Discontinued Operations, Disposed of by Sale | Travelzoo Singapore
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage sold	100.00%

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