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Revenues, Recognition and Allowances - Narrative (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019 USD ($) transaction_type	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($) segment product transaction_type	Jun. 30, 2018 USD ($)	Dec. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Types of transactions \| transaction_type	3		3
Segments \| segment			1
Allowance for doubtful accounts	$ 2.7		$ 2.7		$ 2.6
Allowance for doubtful accounts related to one customer	1.7		$ 1.7
Accounts receivable, terms of customer credit			100 days
Percentage of net sales for royalty			40.00%
Royalty expense	0.3	$ 0.7	$ 0.6	$ 1.5
United States
Disaggregation of Revenue [Line Items]
Products manufactured, marketed and distributed \| product			4
Net Of SRA Balance
Disaggregation of Revenue [Line Items]
Accounts receivable	$ 15.5		$ 15.5		$ 18.1