Income Taxes (Details Textual) $ in Millions	9 Months Ended
	Sep. 30, 2017 affiliate	Dec. 31, 2016 USD ($)
Income Tax Examination [Line Items]
Number of foreign affiliates subject to tax in Estonia | affiliate	1
Tax rate for earnings and profits as they are generated	0.00%
Tax rate for earnings and profits that are distributed to shareholders	20.00%
Tax rate applied to dividends	20.00%
Operating loss carryforwards		$ 33.7
Change in ownership percent		50.00%
Ownership change (greater than)		5.00%
Not Subject to Limitations | Subsequent To Change Date In 2010
Income Tax Examination [Line Items]
Operating loss carryforwards		$ 15.0
Subject to Limitations | Minimum
Income Tax Examination [Line Items]
Operating loss carryforwards		1.0
Subject to Limitations | Maximum
Income Tax Examination [Line Items]
Operating loss carryforwards		$ 2.3