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v3.21.1

Related Party Transactions (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 5 Months Ended
--- | --- | --- | ---
Jan. 01, 2020 | Mar. 31, 2021 | Mar. 31, 2020 | Mar. 31, 2021
Related Party Transaction [Line Items] |  |  |  |
Sublease rental income |  | $ 2,564 | $ 2,805 |
Stagwell Subsidiary [Member] | Services Provided By Subisidiary [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Due to Related Parties |  | 2,000 |  | $ 2,000
Accounts Payable, Related Parties |  | 101 |  | 101
Stagwell Subsidiary [Member] | Event Management Services |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Related Party Transaction, Amounts of Transaction |  |  |  | 456
Due from Related Parties |  | 316 |  | 316
Stagwell Affiliate [Member] | Affiliated Entity [Member] | Arrangement To Perform Media, Planning, Buying And Reporting Services [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Accounts receivable, related parties, current |  | 529 |  | 529
Due from (to) from related parties |  | $ 0 |  | $ 0
Other Company [Member] | Board of Directors Chairman [Member] |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Sublease rental income | $ 65 |  |  |

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