Income Taxes (Narrative) (Details) - USD ($)	1 Months Ended	12 Months Ended
	Dec. 22, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Taxes (Textual)
Future taxable income to use net operating loss carryforwards before expiration		$ 190,363,000
Operating loss carryforwards, expiration description		Operating loss carry forwards between 2022 and 2039.
Operating loss carryforwards, limitations on use		Federal net operating loss carry forwards of approximately $190,363,000 to reduce future U.S. taxable income.
Operating loss carryforward, available		$ 132,510,000
Income tax examination, description		The U.S. federal income tax returns remain subject to examination for the years beginning in 2015.
U.S. federal corporate tax rate		21.00%	34.00%	34.00%
Net deferred tax assets		$ 1,671,000	$ 4,497,000
Description of ownership change		The Company continuously monitors all shareholders that might reach a 5% ownership in the common stock for various purposes, in addition to the I.R.C §382/383 limitation on net operating loss ("NOL") carryforwards following an ownership change. Sections 382/383 limit the use of corporate NOLs following an ownership change. Section 382(g) defines an ownership change generally as a greater than 50% change in the ownership of stock among certain 5% shareholders over a three-year period. For the tax years during the prior 3 years and including the tax year 2018, there are and have been no 5% shareholders even among public institutional shareholders.
Maximum [Member]
Income Taxes (Textual)
U.S. federal corporate tax rate	35.00%
Minimum [Member]
Income Taxes (Textual)
U.S. federal corporate tax rate	21.00%