Revenues, Recognition and Allowances - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue, net	$ 13,586	$ 18,341	$ 21,033	$ 31,463
Company product sales
Disaggregation of Revenue [Line Items]
Revenue, net	13,025	17,868	20,164	30,363
Contract manufacturing sales
Disaggregation of Revenue [Line Items]
Revenue, net	310	388	507	930
Research and development services and other income
Disaggregation of Revenue [Line Items]
Revenue, net	251	85	362	170
Topical
Disaggregation of Revenue [Line Items]
Revenue, net	8,776	12,937	14,156	21,969
Injectables
Disaggregation of Revenue [Line Items]
Revenue, net	$ 4,249	$ 4,931	$ 6,008	$ 8,394