Leases (Schedule of Lease Costs and Other Information) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Amortization of right-of-use assets	$ 85	$ 75
Interest on lease liabilities	8	10
Operating lease cost	540	431
Short-term lease cost	18	18
Variable lease cost	(2)	(1)
Total lease cost	649	533
Operating cash flows from finance leases	8	10
Operating cash flows from operating leases (Fixed payments)	496	349
Operating cash flows from operating leases (Liability reduction)	250	85
Financing cash flows from finance leases	83	73	$ 38
Right-of-use assets obtained in exchange for new finance lease liabilities	88	22
Right-of-use assets obtained in exchange for new operating lease liabilities	$ 1,338	$ 6,189
Weighted-average remaining lease term - finance leases	3 years 1 month 13 days	3 years 8 months 1 day
Weighted average remaining lease term - operating leases	21 years 3 months 18 days	23 years 10 months 17 days
Weighted-average discount rate - finance leases	2.52%	3.07%
Weighted-average discount rate - operating leases	3.56%	3.78%