Summary of Significant Accounting Policies - Narrative (Details) $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($) segment entity	Dec. 31, 2020 USD ($)
Accounting Policies [Abstract]
Reportable segment \| segment	1
Money market deposits, exceeding federally insured limits \| $	$ 0.4	$ 0.2
Variable interest entity, number of entities \| entity	2

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 18
-URI http://asc.fasb.org/extlink&oid=123359005&loc=d3e8672-108599

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration