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Impairments (Tables) | 9 Months Ended
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Sep. 30, 2021
Disclosure Text Block Supplement [Abstract] |
Summary of Impairments Recognized | The following table summarizes impairments recognized by the Company:
|  | Three Months Ended September 30, |  |  | Nine Months Ended September 30, |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Lease termination – New York office (Note 13) |  | $ | 9,277 |  |  | $ | — |  |  | $ | 9,277 |  |  | $ | — |
Fixed assets – New York office (Note 8) |  |  | 6,576 |  |  |  | — |  |  |  | 6,576 |  |  |  | — |
Lease termination – London office (Note 13) |  |  | — |  |  |  | — |  |  |  | 303 |  |  |  | — |
AdvisorEngine – Financial Interests (Note 23) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 19,672 |
Thesys – Series Y Preferred (Note 4) |  |  | — |  |  |  | 3,080 |  |  |  | — |  |  |  | 3,080 |
Total |  | $ | 15,853 |  |  | $ | 3,080 |  |  | $ | 16,156 |  |  | $ | 22,752 |

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- Definition Tabular disclosure for impairment of long-lived assets held and used by an entity which includes a description of the impaired long-lived asset and facts and circumstances leading to the impairment, aggregate amount of the impairment loss and where the loss is located in the income statement, method(s) for determining fair value, and the segment in which the impaired long-lived asset is reported. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109226691&loc=d3e2921-110230 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.CC) -URI http://asc.fasb.org/extlink&oid=27011434&loc=d3e125687-122742 + Details
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