Loans - Amortized cost basis of loans on nonaccrual status (Details) - USD ($)	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Interest income on loans on nonaccrual status		$ 8,000
Reversal of interest income upon placing commercial loans on nonaccrual status	$ 8,000	8,000
Loans on nonaccrual status	1,900,000	1,900,000	$ 1,298,000
Construction - consumer real estate
Loans on nonaccrual status	517,000	517,000
Residential mortgage
Loans on nonaccrual status	531,000	531,000	320,000
Equity lines
Loans on nonaccrual status	50,000	50,000	77,000
Other consumer
Loans on nonaccrual status			9,000
Consumer finance | Automobiles
Loans on nonaccrual status	780,000	780,000	$ 892,000
Consumer finance | Marine and recreational vehicles
Loans on nonaccrual status	$ 22,000	$ 22,000