Income Taxes Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision (benefit)	$ (1,022)	$ 1,208
Cumulative valuation allowance	61,400
Decrease in net deferred tax liabilities	374	$ 209
Deferred tax liability recorded associated with unremitted earnings of foreign subsidiary no longer considered indefinitely reinvested	4,900
Undistributed earnings of Swiss subsidiary	97,600
Repatriation of Swiss accumulated earnings	$ 10,000
Withholding tax percentage	5.00%