Revenue Recognition (Details) $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($) distributor	Mar. 31, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Provisions for revenue reserves to reduce product revenues to product revenues, net | $	$ 43.6	$ 16.2
Distributor One
Disaggregation of Revenue [Line Items]
Concentration risk percentage		36.00%
Distributor Two
Disaggregation of Revenue [Line Items]
Concentration risk percentage		34.00%
Distributor Three
Disaggregation of Revenue [Line Items]
Concentration risk percentage		27.00%
Customer Concentration Risk | Sales Revenue, Net | Rhopressa
Disaggregation of Revenue [Line Items]
Number of distributors | distributor	3
Customer Concentration Risk | Sales Revenue, Net | Rhopressa | Distributor One
Disaggregation of Revenue [Line Items]
Concentration risk percentage	37.00%
Customer Concentration Risk | Sales Revenue, Net | Rhopressa | Distributor Two
Disaggregation of Revenue [Line Items]
Concentration risk percentage	33.00%
Customer Concentration Risk | Sales Revenue, Net | Rhopressa | Distributor Three
Disaggregation of Revenue [Line Items]
Concentration risk percentage	28.00%