Borrowings (Details) - Line of Credit - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Sep. 30, 2021
Line of Credit Facility [Line Items]
Line of credit amount			$ 25,000,000
Commitment fee	$ 15,000	$ 60,000
Fee required on each borrowing	0.05%
Maximum fee	$ 20,000
Maximum fee term limitation	364 days
Line of Credit Minimum Interest Rate	3.00%
Compensating Balance, Amount	$ 2,500,000
Minimum
Line of Credit Facility [Line Items]
Debt Instrument, Term	60 days
Maximum
Line of Credit Facility [Line Items]
Debt Instrument, Term	180 days
LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.75%