Lease Liabilities (Supplemental Balance Sheet Information Related To Leases) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Lease Liabilities [Abstract]
Right of use asset - operating leases	$ 42	$ 41
Lease liabilities - current	42	41
Total operating lease liabilities	42	41
Other property and equipment, gross	342	295
Accumulated depreciation	(240)	(146)
Other property and equipment, net	102	149
Lease liabilities - current	61	61
Lease liabilities - noncurrent	16	41
Total finance lease liabilities	$ 77	$ 102