Revenues, Recognition and Allowances - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue, net	$ 14,339	$ 18,466	$ 35,372	$ 49,929
Company product sales
Disaggregation of Revenue [Line Items]
Revenue, net	13,933	18,228	34,097	48,591
Contract manufacturing sales
Disaggregation of Revenue [Line Items]
Revenue, net	306	167	813	1,097
Research and development services and other income
Disaggregation of Revenue [Line Items]
Revenue, net	100	71	462	241
Topical
Disaggregation of Revenue [Line Items]
Revenue, net	11,982	13,271	26,138	35,240
Injectables
Disaggregation of Revenue [Line Items]
Revenue, net	$ 1,951	$ 4,957	$ 7,959	$ 13,351