Assets and liabilities as well as costs of operating and finance leases (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Liabilities
Operating leases	$ 86	$ 73	$ 163	$ 147
Amortization of leased assets	56	77	112	112
Interest on finance leases	39	41	79	82
Total lease cost	$ 181	$ 191	$ 354	$ 341
Operating leases	5 years 109 days 12 hours		5 years 109 days 12 hours		5 years 328 days 12 hours
Financing leases	21 years 109 days 12 hours		21 years 109 days 12 hours		21 years 6 months
Weighted Average Discount Rate 1
Operating leases	3.70%		3.70%		3.63%
Financing leases	3.70%		3.70%		3.74%
Assets And Liabilities [Member]
Assets
Operating	$ 1,125		$ 1,125		$ 1,175
Finance	3,745		3,745		3,856
Total Leased Assets	4,870		4,870		5,031
Liabilities
Operating	1,125		1,125		1,175
Finance	4,189		4,189		4,262
Total lease liabilities	$ 5,314		$ 5,314		$ 5,437