Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Income Taxes [Line Items]
Provision or benefit for income taxes
Unrecognized tax benefits	0		$ 0
Federal net operating loss carryforwards					$ 34,800,000
Estimated annual effective tax rate			0.00%
Accounts receivable	695,000		$ 695,000		$ 517,000
Restatement Adjustment [Member]
Income Taxes [Line Items]
Accounts receivable	$ 121,000		$ 121,000
Minimum [Member]
Income Taxes [Line Items]
Federal net operating loss carryforwards expiration between, years			Dec. 31, 2019
Maximum [Member]
Income Taxes [Line Items]
Federal net operating loss carryforwards expiration between, years			Dec. 31, 2036