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Summary of Significant Accounting Policies - Narrative (Details) $ / shares in Units, supplier in Thousands, ¥ in Millions, shares in Millions, member in Millions				1 Months Ended	3 Months Ended					12 Months Ended
	Dec. 30, 2022 USD ($) $ / shares shares	Oct. 31, 2022 USD ($)	Jun. 16, 2020 JPY (¥)	Jan. 31, 2022 USD ($)	Mar. 31, 2023 USD ($) member supplier	Mar. 31, 2023 JPY (¥) member supplier	Sep. 30, 2022 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Related Party Transaction
Number of members | member					30.0	30.0
Number of travel supplier partnerships | supplier					5	5
Working capital					$ 6,000,000
Net cash provided by (used in) operating activities					535,000			$ (6,764,000)
Merchant payables					27,976,000					$ 32,574,000
Cash and cash equivalents					19,138,000					18,693,000
Deferred revenue					3,100,000					1,200,000
Deferred revenue recognized					630,000
Voucher liability, current					7,000,000					8,100,000
Customer voucher refund liability					785,000					$ 1,300,000
Goodwill impairments		$ 0			$ 0
Private Placement
Related Party Transaction
Number of shares sold | shares	3.4
Sale of stock (in dollars per share) | $ / shares	$ 4.45
Sale of stock, total consideration	$ 15,200,000
Sale of stock, cash	1,000,000
Sale of stock, promissory note	$ 4,800,000
Sale of stock, accrued interest (as a percent)	12.00%
Board of Directors Chairman
Related Party Transaction
Ownership percentage held by related party					50.50%					50.30%
Brother Of Board Of Directors Chairman
Related Party Transaction
Ownership percentage held by related party					4.20%
Travelzoo Europe
Related Party Transaction
Deferred revenue					$ 1,900,000
Travelzoo North America
Related Party Transaction
Deferred revenue					1,200,000
Government Assistance, CARES Act
Related Party Transaction
Proceeds from government funding				$ 1,200,000			$ 494,000	1,200,000
CANADA
Related Party Transaction
Job retention fund								68,000
North America
Related Party Transaction
Deferred revenue recognized					981,000
Europe
Related Party Transaction
Deferred revenue recognized					$ 250,000
Jack’s Flight Club
Related Party Transaction
Number of members | member					2.0	2.0
Goodwill impairments									$ 2,100,000	$ 0
Travelzoo Japan
Related Party Transaction
Royalty recognized					$ 8,000			$ 5,000
Discontinued Operations, Disposed of by Sale | Travelzoo Japan
Related Party Transaction
Interest free loan amount			¥ 46.0		430,000	¥ 46.0
Debt paid off					$ 39,000						$ 133,000
Travelzoo Japan | Royalty Agreement Terms
Related Party Transaction
Term					5 years	5 years
Travelzoo Japan | Loan Issued to Travelzoo Japan
Related Party Transaction
Term											5 years

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