Income Taxes - Schedule of Open Tax Years for Which the Company could be Subject to Income Tax Examination (Details)	12 Months Ended
	Dec. 31, 2017
United States | Earliest Tax Year
Income Tax Examination [Line Items]
Year under examination	2012
United States | Latest Tax Year
Income Tax Examination [Line Items]
Year under examination	2016
China | Earliest Tax Year
Income Tax Examination [Line Items]
Year under examination	2007
China | Latest Tax Year
Income Tax Examination [Line Items]
Year under examination	2016
France | Earliest Tax Year
Income Tax Examination [Line Items]
Year under examination	2013
France | Latest Tax Year
Income Tax Examination [Line Items]
Year under examination	2016
Germany | Earliest Tax Year
Income Tax Examination [Line Items]
Year under examination	2011
Germany | Latest Tax Year
Income Tax Examination [Line Items]
Year under examination	2016