Commitments and Contingencies - Additional Information (Details) - Financial Standby Letters of Credit $ in Millions	Dec. 31, 2020 USD ($) Lease	Dec. 31, 2019 USD ($)
Loss Contingencies [Line Items]
Letters of credit outstanding	$ 2.2
Number of lease agreements \| Lease	3
Required cash deposit with financial institution	$ 2.2	$ 1.9

The amount of securities on deposit with clearing organizations and other entities which provide services necessary to operations of the Company. This item would include, for instance, securities advanced as refundable collateral for securities borrowed.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.8,17)
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_DepositsWithClearingOrganizationsAndOthersSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant