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Commitments and Contingencies (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2004 | Dec. 31, 2002 | Mar. 31, 2022
Business Acquisition [Line Items] |  |  |
Purchase obligation |  |  | $ 2.3
Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Remaining lease term |  |  | 1 year
Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Remaining lease term |  |  | 8 years
Travel Zoo Com Corporation |  |  |
Business Acquisition [Line Items] |  |  |
Period for receiving shares under merger | 2 years | 2 years |
Number of shares exchanged under merger (in shares) |  | 1 |

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- Details
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