Income Taxes (Details Textual) $ in Millions	Dec. 31, 2017 USD ($)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Valuation Allowance	$ 6.7
Foreign Country [Member]
Operating Loss Carryforwards [Line Items]
Foreign net operating loss carryforwards, do not expire	6.9
Foreign net operating loss carryforwards subject to expiration	8.6
Operating Loss Carryforwards Subject To Expiration In Next 12 months	1.0
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Foreign net operating loss carryforwards subject to expiration	21.7
Tax Credit, Amount	$ 3.2