Related Party Transactions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Brother-in-law of former General Counsel and Secretary | Related Party - Total Compensation
Related Party Transaction [Line Items]
Related party expenses	$ 0.2	$ 0.2
Brother-in-law of former General Counsel and Secretary | Related Party - Salary
Related Party Transaction [Line Items]
Related party expenses	0.1	0.1
Brother-in-law of former General Counsel and Secretary | Related Party - Sales Commissions, Equity, Incentive, and Other Compensation
Related Party Transaction [Line Items]
Related party expenses	0.1	0.1
Chief Scientific Officer | Related Party - Salary
Related Party Transaction [Line Items]
Related party expenses	0.2	0.2
Chief Scientific Officer | Related Party - Sales Commissions, Equity, Incentive, and Other Compensation
Related Party Transaction [Line Items]
Related party expenses	0.3	0.2
Distributor in which Family of CEO had Financial Interest
Related Party Transaction [Line Items]
Related party revenue	$ 2.3	$ 3.5	$ 2.7