Income Taxes (Narrative) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2019 USD ($)
Income Taxes [Line Items]
Operating loss carryforwards	$ 71.8
Tax Credit Carryforward, Amount	$ 0.1
Operating Loss Carryforwards, Expiration Date	Substantially all of the net operating loss carry forwards and unused minimum tax credit carry forwards expire between 2024 and 2037.
Operating Loss Carryforwards, Limitations on Use	The Company’s utilization of restricted net operating tax loss carry forwards against future income for tax purposes is restricted pursuant to the “change in ownership” rules in Section 382 of the Internal Revenue Code.
Unrestricted [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 56.6
Restricted [Member]
Income Taxes [Line Items]
Operating loss carryforwards	$ 15.2