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Revenues, Recognition and Allowances - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2019 USD ($) transaction_type segment product	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)
Disaggregation of Revenue [Line Items]
Types of transactions \| transaction_type	3
Segments \| segment	1
Allowance for doubtful accounts	$ 2.5		$ 2.6
Allowance for doubtful accounts related to one customer	$ 1.7
Accounts receivable, terms of customer credit	100 days
Percentage of net sales for royalty	40.00%
Royalty expense	$ 0.3	$ 0.8
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	$ 13.7		$ 18.1