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Income Taxes (Details Textual) $ in Millions	12 Months Ended
Income Taxes (Details Textual) $ in Millions	Dec. 31, 2017 USD ($)
Income Taxes (Textual)
Corporate income tax, description	The Tax Act reduced the corporate income tax rate from 35% to 21% effective January 1, 2018. We have re-measured our U.S. deferred tax assets and liabilities, which resulted in a reduction of our net deferred tax assets with a corresponding adjustment to valuation allowance. As a result, no tax expense is recorded related to the enactment of the Tax Act.
Open tax years	2008 through 2016
Federal [Member]
Income Taxes (Textual)
Operating loss carryforwards	$ 58.0
Operating loss carryforwards, expiration date	Dec. 31, 2028
State [Member]
Income Taxes (Textual)
Operating loss carryforwards	$ 20.0
Operating loss carryforwards, expiration date	Dec. 31, 2030
Foreign [Member]
Income Taxes (Textual)
Operating loss carryforwards	$ 2.9

Description of circumstance resulting in valuation allowance being recorded for tax benefit to be credited directly to shareholders' equity. Includes, but is not limited to, adjustment to opening balance of retained earnings for change in accounting principle or correction of error, gain (loss) in comprehensive income (loss) but excluded from net income (loss), deductible expenditure for income tax purposes reported as reduction of shareholders' equity, and deductible temporary difference existing at date of quasi-reorganization.

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