Assets and liabilities as well as costs of operating and finance leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Liabilities
Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization	$ 532		$ 496
Operating leases	74	$ 80
Amortization of leased assets	35	25
Interest on finance leases	41	32
Total lease cost	$ 150	$ 137
Operating leases	7 years 73 days		6 years 328 days 12 hours
Financing leases	24 years 328 days 12 hours		23 years 6 months
Weighted Average Discount Rate 1
Operating leases	3.71%		3.61%
Financing leases	3.89%		4.97%
Assets And Liabilities [Member]
Assets
Operating	$ 966		$ 1,021
Finance	4,045		3,791
Total Leased Assets	5,011		4,812
Liabilities
Operating	966		1,021
Finance	4,363		4,107
Total lease liabilities	$ 5,329		$ 5,128