Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Provision for income taxes
Operating loss carry-forward	$ 147,086,000	127,877,000
Net operating loss carry-forwards expiration	Dec. 31, 2021
Federal And State [Member]
Operating Loss Carryforwards [Line Items]
Provision for income taxes	$ 0	$ 0