Income Taxes (Summary of Operating Loss Carryforwards and Tax Credit Carryforwards) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Net deferred tax asset, net operating loss	$ 2,867	$ 1,456
Total net deferred tax asset	2,867	1,456
Total valuation allowance	987	917
State and local jurisdiction
Operating Loss Carryforwards [Line Items]
Net deferred tax asset, net operating loss	2,867	1,456
Valuation allowance, net operating loss	$ 987	$ 917