Property, Plant and Equipment, Net - Additional Information (Details) ft² in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) ft²	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Property, Plant and Equipment [Line Items]
Area of interior floor space (in sqft) | ft²	30
Build-to-suit, long term obligation	$ 4.4		$ 4.5
Capital expenditures related to manufacturing plant	2.8
Unrealized foreign currency gain (loss)	0.1	$ (0.1)
Property, Plant and Equipment
Property, Plant and Equipment [Line Items]
Capitalized amount of build-to-suit asset	4.2
Other Current Liabilities
Property, Plant and Equipment [Line Items]
Build-to-suit, long term obligation	$ 0.2		$ 0.2