Leases (Schedule of Other Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Leases [Abstract]
Operating cash flows from operating leases	$ 14	$ 15	$ 29	$ 31
Financing cash flows from finance leases	270	294	542	549
Right-of-use assets obtained in exchange for new finance lease liabilities	69	94	137	108
Right-of-use assets obtained in exchange for new operating lease liabilities
Finance lease right-of-use assets	13,106		13,106		$ 12,318
Operating lease right-of-use assets	84		84		113
Finance lease liability, current	1,127		1,127		1,133
Finance lease liability, non-current	11,647		11,647		11,647
Operating lease liabilities, current	63		63		60
Operating lease liabilities, non-current	$ 22		$ 22		$ 54
Weighted average remaining lease terms - finance leases	20 years 6 months 29 days		20 years 6 months 29 days		20 years 6 months 29 days
Weighted average remaining lease terms - operating leases	1 year 3 months 29 days		1 year 3 months 29 days		1 year 9 months 29 days
Weighted average discount rate - finance leases	6.42%		6.42%		6.42%
Weighted average discount rate - operating leases	6.48%		6.48%		7.75%