Property, Plant and Equipment, net - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Depreciation expense recorded	$ 1.2	$ 1.3
Rent received from leases	0.4	0.3
Future minimum rent payments due in 2019	1.7
Future minimum rent payments due in 2020	1.0
Rental expense on operating leases	$ 1.9	$ 3.0
Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	20 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	25 years
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful lives	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful lives	8 years