Income Taxes (Details) - USD ($)	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income Taxes [Abstract]
(Provision) benefit for income taxes	$ 10,000	$ 106,000	$ 187,000	$ 41,000
Deferred income taxes (Note 7)	612,000		612,000		$ 818,000
Unrecognized tax benefits	667,000		667,000		648,000
Interest and penalties	$ 297,000		$ 297,000		$ 278,000

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of unrecognized tax benefits.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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