Commitments and Contingencies (Reconciliation of the Lease Liability to Future Lease Payments) (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Commitments and Contingencies [Abstract]
Operating lease payments (April 1, 2021 to December 31, 2021)	$ 481
Less: Future interest	11
Operating lease liability	$ 470
Operating lease liability, statement of financial position	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent
Operating lease liability, current	$ 470	$ 345
Operating lease liability, current statement of financial position	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent