Fair Value Disclosures (Narrative) (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Inventory impairment charge	$ 0.8
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Inventory carrying value before impairment	2.3
Fair Value [Member] | Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Inventory fair value	$ 1.5