Commitments and Contingencies (Reconciliation of the Lease Liability to Future Lease Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Commitments and Contingencies [Abstract]
2021 (January 1, 2021 to June 30, 2021)	$ 350
Total operating lease payments	350
Less: interest	(5)
Operating lease liability	$ 345
Operating lease liability, statement of financial position	us-gaap:Liabilities
Operating lease liability, current	$ 345	$ 652
Operating lease liability, current statement of financial position	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent