Income Taxes (Details Textual)	3 Months Ended
	Mar. 31, 2019 USD ($)
Income Tax [Line Items]
Reserve for uncertain tax positions	$ 0
Income tax benefit	82,000
Research Tax Credit Carryforward | Federal | Protecting Americans from Tax Hikes Act of 2015
Income Tax [Line Items]
Income tax benefit	82,000
Research Tax Credit Carryforward | Federal | Protecting Americans from Tax Hikes Act of 2015 | Maximum
Income Tax [Line Items]
Research and experimentation credits	$ 250,000