Leases (Schedule of Lease Costs and Other Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Leases [Abstract]
Amortization of right-of-use assets	$ 24	$ 20
Interest on lease liabilities	2	2
Operating lease cost	148	108
Short-term lease cost	5	5
Variable lease cost	1	(1)
Total lease cost	180	134
Operating cash flows from finance leases	2	2
Operating cash flows from operating leases (Fixed payments)	138	99
Operating cash flows from operating leases (Liability reduction)	77	39
Financing cash flows from finance leases	$ 24	$ 18
Weighted-average remaining lease term - finance leases	2 years 10 months 20 days	3 years 5 months 1 day
Weighted average remaining lease term - operating leases	21 years 1 month 17 days	23 years 7 months 28 days
Weighted-average discount rate - finance leases	2.50%	3.07%
Weighted-average discount rate - operating leases	3.57%	3.78%