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Collateralized Transactions	3 Months Ended
	Mar. 31, 2021
Brokers And Dealers [Abstract]
Collateralized Transactions	8. Collateralized Transactions Repurchase Agreements Securities sold under Repurchase Agreements are accounted for as collateralized financing transactions and are recorded at the contractual amount for which the securities will be repurchased, including accrued interest. As of March 31, 2021, Cantor facilitated Repurchase Agreements between the Company and Cantor in the amount of $0.1 million for the purpose of financing fails. U.S. Treasury or other fixed income securities were provided to Cantor as collateral for the fair value of the Repurchase Agreements. These Repurchase Agreements had a maturity date of April 1, 2021. As of December 31, 2020, Cantor had not facilitated any Repurchase Agreements between the Company and Cantor.

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- Definition

The entire disclosure for repurchase agreements (also known as repos), resale agreements (also known as reverse repurchase agreements or reverse repos), securities borrowed transactions, and securities loaned transactions.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-URI http://asc.fasb.org/topic&trid=2197590

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