Basis of Presentation and Significant Accounting Policies (Property and Equipment) (Details)	6 Months Ended
	Jun. 30, 2018
Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Tools, Dies and Molds | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	1 year
Tools, Dies and Molds | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Software Development | Minimum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Software Development | Maximum
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	30 years