Income Taxes (Details Narrative) $ in Thousands	12 Months Ended
	Dec. 31, 2016 USD ($)
Income Tax Disclosure [Abstract]
Net operating loss carryforwards resulting from tax deductions upon the exercise of employee stock options	$ 1,900
Net operating loss carryforwards for federal income tax	404,000
Net operating loss carryforwards for federal research	$ 2,700