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Summary of Significant Accounting Policies - Narrative (Details) ¥ in Millions, member in Millions			1 Months Ended	3 Months Ended			12 Months Ended
	Jun. 16, 2020 USD ($)	Jun. 16, 2020 JPY (¥)	Jan. 31, 2022 USD ($)	Mar. 31, 2022 USD ($) member	Mar. 31, 2022 JPY (¥) member	Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 23, 2020
Related Party Transaction
Number of members | member				30.0	30.0
Proceeds from sale of equity method investments				$ 196,000		$ 0
Other income				1,200,000
Working capital				20,800,000
Cash used in operating activities				6,764,000		(9,064,000)
Merchant payables				60,479,000			$ 68,678,000
Cash and cash equivalents value				$ 35,617,000			43,815,000
Ownership percentage held by related party				38.00%
Deferred revenue				$ 2,300,000			1,300,000
Deferred revenue recognized				575,000
Voucher liability, current				15,100,000			17,200,000
Customer voucher refund liability				3,800,000			5,200,000
Impairment of intangible assets				0		0
Goodwill impairments				0		0
Travelzoo North America
Related Party Transaction
Deferred revenue				652,000
Travelzoo Europe
Related Party Transaction
Deferred revenue				1,700,000
Government Assistance, CARES Act
Related Party Transaction
Proceeds from government funding			$ 1,200,000
CANADA
Related Party Transaction
Job retention fund				68,000		168,000
Europe
Related Party Transaction
Job retention fund						20,000
Deferred revenue recognized				$ 211,000
North America
Related Party Transaction
Deferred revenue recognized						473,000
Jack’s Flight Club
Related Party Transaction
Number of members | member				1.7	1.7
Goodwill impairments				$ 2,100,000
Weekengo
Related Party Transaction
Equity method investment ownership percentage									33.70%
Proceeds from sale of equity method investments				195,000
Realized gain (loss) on disposal								$ 468,000
Letters of credit outstanding, amount				200,000
Travelzoo Japan
Related Party Transaction
Royalty recognized				2,000
Discontinued Operations, Disposed of by Sale | Travelzoo Japan
Related Party Transaction
Term	3 years	3 years
Interest free loan amount	$ 430,000	¥ 46.0		430,000	¥ 46.0
Debt Paid Off							$ 133,000
Royalty recognized				$ 0		$ 9,000
Travelzoo Japan | Royalty Agreement Terms
Related Party Transaction
Term	5 years	5 years
Travelzoo Japan | Loan Issued to Travelzoo Japan
Related Party Transaction
Term				3 years	3 years			5 years
Trivago | Weekengo
Related Party Transaction
Proceeds from sale of equity method investments				$ 2,900,000

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