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Income Taxes (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax [Line Items]
Reserve for uncertain tax positions	$ 0		$ 0
Income tax benefit	9,000	$ 27,000	9,000	$ 109,000
Alternative Minimum Tax | Federal | Protecting Americans from Tax Hikes Act of 2015
Income Tax [Line Items]
Income tax benefit	$ 9,000		$ 9,000
Research Tax Credit Carryforward | Federal | Protecting Americans from Tax Hikes Act of 2015
Income Tax [Line Items]
Income tax benefit		$ 27,000		$ 109,000

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Income tax.

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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 recognized for uncertainty in income taxes classified as current.

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