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v3.20.1

Related Party Transactions (Details) - USD ($) $ in Thousands |  | 3 Months Ended
--- | --- | ---
Jan. 01, 2020 | Mar. 31, 2020 | Mar. 31, 2019
Related Party Transaction [Line Items] |  |  |
Sublease rental income |  | $ 2,805 | $ 1,599
Stagwell Subsidiary [Member] | Services Provided By Subisidiary [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Due to Related Parties |  | 655 |
Accounts Payable, Related Parties |  | 565 |
Stagwell Subsidiary [Member] | Development of Advertising Technology [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Due to Related Parties |  | 460 |
Accounts Payable, Related Parties |  | $ 170 |
Other Company [Member] | Board of Directors Chairman [Member] |  |  |
Related Party Transaction [Line Items] |  |  |
Sublease rental income | $ 229 |  |

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- Definition Amount of sublease income excluding finance and operating lease expense. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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