Financial Instruments Owned, at Fair Value	9 Months Ended
	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Financial Instruments Owned, at Fair Value	Financial Instruments Owned, at Fair ValueFinancial instruments owned, at fair value consist of the Company's ownership of equities, domestic government bonds, foreign government bonds, and corporate bonds carried at fair value in accordance with ASU 2016-01. Financial instruments owned, at fair value primarily consist of unencumbered U.S. Treasury bills held for liquidity purposes. Total Financial instruments owned, at fair value were $38.4 million and $41.2 million as of September 30, 2022 and December 31, 2021, respectively. For additional information, see Note 12—“Fair Value of Financial Assets and Liabilities.”These instruments are measured at fair value, with any changes in fair value recognized in earnings in the Company's unaudited Condensed Consolidated Statements of Operations. The Company recognized unrealized net losses of $32 thousand and $10 thousand for the three months ended September 30, 2022 and 2021, respectively, related to the mark-to-market adjustments on such instruments. The Company recognized unrealized net losses of $0.2 million and $6 thousand for the nine months ended September 30, 2022 and 2021, respectively, related to the mark-to-market adjustments on such instruments.