Income Taxes - Components of Tax Provision and Reconciliation to Statutory Federal Income Tax Rate (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Components of domestic and foreign income before income taxes
Pretax income (loss) before income taxes, U.S.	$ (957)	$ (703)
Pretax income (loss) before income taxes, Foreign	6,209	4,649
Total	5,252	3,946
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction
Current	1,660	1,469
Deferred	(266)	(161)
Provision for income taxes	$ 1,394	$ 1,308
Effective income tax rate (as a percent)	26.50%	33.10%
U.S. Federal income tax statutory rate	$ 1,786	$ 1,342
Foreign income tax rate differential	(966)	(697)
Permanent items	408	(300)
Other	(137)	430
Change in valuation allowance	303	533
Provision for income taxes	1,394	1,308
Income tax benefit recorded related to reported losses on domestic operations	0
Valuation allowance on deferred tax assets	$ 16,130	$ 18,116
Czech Republic
Income Tax
Corporate income tax on adjusted net income (as a percent)	19.00%
Foreign
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction
Net operating loss carry forwards	$ 98
U.S.
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction
Net operating loss carry forwards	38,825
Valuation allowance on deferred tax assets	$ 16,130
Germany
Income Tax
Corporate income tax on adjusted net income (as a percent)	30.00%
State
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction
Net operating loss carry forwards	$ 44,790
Czech | Maximum
Income Tax Expense (Benefit), Continuing Operations, by Jurisdiction
Percentage of total tax expense (benefit) recorded related to properties by country	100.00%