Investment in Convertible Notes (Details) - USD ($)			12 Months Ended
	Oct. 11, 2019	Jul. 19, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Mar. 09, 2021	Jul. 30, 2020
Debt Securities, Available-for-sale [Line Items]
Unrealized gain on investment in convertible notes			$ 93,000	$ 0	$ 0
Monthly installment receivable	$ 1,000,000
Convertible Promissory Notes
Debt Securities, Available-for-sale [Line Items]
Investment purchase (up to)	$ 25,000,000.0	$ 30,000,000.0					$ 25,000,000.0
Investment interest rate		3.00%
Investment maturity		6 months
Convertible Promissory Notes | Subsequent Event
Debt Securities, Available-for-sale [Line Items]
Investment purchase (up to)						$ 25,000,000.0
Convertible Promissory Notes | Subordinated Debt
Debt Securities, Available-for-sale [Line Items]
Investment purchase (up to)		$ 5,000,000.0					$ 5,000,000.0
Convertible Promissory Notes | Subordinated Debt | Subsequent Event
Debt Securities, Available-for-sale [Line Items]
Investment purchase (up to)						$ 5,000,000.0