Commitments and Contingencies (Schedule of Future Minimum Payments) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Jan. 01, 2019
Stock-Based Compensation [Abstract]
Operating lease payments, 2020	$ 701
Operating lease payments, 2021	350
Future operating lease payments, Total	1,051
Less: interest	(54)
Operating Lease, Liability, Total	997	$ 300
Operating lease liability, current	$ 652
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities Current
Operating lease liability, noncurrent	$ 345
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List	us-gaap:OtherLiabilitiesNoncurrent