Assets and liabilities as well as costs of operating and finance leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Liabilities
Operating leases	$ 76	$ 74
Amortization of leased assets	56	35
Interest on finance leases	40	41
Total lease cost	$ 172	$ 150
Operating leases	5 years 219 days		5 years 328 days 12 hours
Financing leases	21 years 6 months		21 years 6 months
Weighted Average Discount Rate 1
Operating leases	3.74%		3.63%
Financing leases	3.76%		3.74%
Assets And Liabilities [Member]
Assets
Operating	$ 1,183		$ 1,175
Finance	3,800		3,856
Total leased assets	4		5,031
Liabilities
Operating	1,183		1,175
Finance	4,225		4,262
Total lease liabilities	$ 5,408		$ 5,437