Commitments and Contingencies (Schedule of Future Minimum Payments) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Stock-Based Compensation [Abstract]
2020 (April 1, 2020 to December 31, 2020)	$ 526
Operating lease payments, 2021	350
Total operating lease payments	876
Less: interest	(37)
Operating lease liability	839
Operating lease liability, current	$ 665	$ 652
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other Liabilities Current
Operating lease liability, noncurrent	$ 174	$ 345
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List	us-gaap:OtherLiabilitiesNoncurrent