Commitments and Contingencies (Reconciliation of the Lease Liability to Future Lease Payments) (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Commitments and Contingencies [Abstract]
Operating lease payments (October 1, 2021 to December 31, 2021)	$ 153
Less: Future interest	1
Operating lease liability	$ 152
Operating lease liability, statement of financial position	Other Liabilities Current	Other Liabilities Current
Operating lease liability, current	$ 152	$ 345
Operating lease liability, current statement of financial position	Other Liabilities Current