Leases (Schedule of Other Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Leases [Abstract]
Operating cash flows from operating leases		$ 14	$ 32	$ 29
Principal payments on finance leases liabilities	$ 307	270	615	542
Right-of-use assets obtained in exchange for new finance lease liabilities		69		137
Right-of-use assets obtained in exchange for new operating lease liabilities
Finance lease right-of-use assets	13,560		13,560		$ 13,908
Operating lease right-of-use assets	22		22		53
Finance lease liability, current	1,229		1,229		1,229
Finance lease liability, non-current	13,481		13,481		13,608
Operating lease liabilities, current	22		22		54
Operating lease liabilities, non-current
Weighted average remaining lease terms - finance leases	19 years 6 months		19 years 6 months		20 years
Weighted average remaining lease terms - operating leases	3 months 29 days	9 months 29 days	3 months 29 days	9 months 29 days
Weighted average discount rate - finance leases	6.94%		6.94%		6.94%
Weighted average discount rate - operating leases	6.48%		6.48%		6.48%