Borrowings - Schedule of short-term borrowings (Details) - USD ($)	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Short-Term Debt [Line Items]
Total short-term debt	$ 16,225,000	$ 17,678,000
Federal funds purchased	0	0
FHLB advances maturing in less than one year from date of origination, and the current portion of long-term FHLB advances due within 12 months
Short-Term Debt [Line Items]
Total short-term debt	4,225,000	5,678,000
Term Loan, current portion due within 12 months
Short-Term Debt [Line Items]
Total short-term debt	$ 12,000,000	$ 12,000,000
Minimum
Short-Term Debt [Line Items]
Short-term borrowings, mature period	1 day
Maximum
Short-Term Debt [Line Items]
Short-term borrowings, mature period	90 days