Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Disaggregation of Revenue [Line Items]
Net Revenue	$ 15,473	$ 15,857	$ 60,000
Drug products
Disaggregation of Revenue [Line Items]
Net Revenue	283	255
Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	15,190	15,602
U.S.
Disaggregation of Revenue [Line Items]
Net Revenue	13,911	14,195
U.S. | Drug products
Disaggregation of Revenue [Line Items]
Net Revenue	225	199
U.S. | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	13,686	13,996
Rest of World
Disaggregation of Revenue [Line Items]
Net Revenue	1,562	1,662
Rest of World | Drug products
Disaggregation of Revenue [Line Items]
Net Revenue	58	56
Rest of World | Concentrate Products
Disaggregation of Revenue [Line Items]
Net Revenue	1,504	1,606
Product Sales – Point-in-time | Drug product sales
Disaggregation of Revenue [Line Items]
Net Revenue	225	199
Product Sales – Point-in-time | Concentrate product sales
Disaggregation of Revenue [Line Items]
Net Revenue	14,705	15,112
Product Sales – Point-in-time | U.S. | Drug product sales
Disaggregation of Revenue [Line Items]
Net Revenue	225	199
Product Sales – Point-in-time | U.S. | Concentrate product sales
Disaggregation of Revenue [Line Items]
Net Revenue	13,201	13,506
Product Sales – Point-in-time | Rest of World | Drug product sales
Disaggregation of Revenue [Line Items]
Net Revenue	0	0
Product Sales – Point-in-time | Rest of World | Concentrate product sales
Disaggregation of Revenue [Line Items]
Net Revenue	1,504	1,606
License Fee – Over time | Drug license fee
Disaggregation of Revenue [Line Items]
Net Revenue	58	56
License Fee – Over time | Concentrate product license fee
Disaggregation of Revenue [Line Items]
Net Revenue	485	490
License Fee – Over time | U.S. | Drug license fee
Disaggregation of Revenue [Line Items]
Net Revenue	0	0
License Fee – Over time | U.S. | Concentrate product license fee
Disaggregation of Revenue [Line Items]
Net Revenue	485	490
License Fee – Over time | Rest of World | Drug license fee
Disaggregation of Revenue [Line Items]
Net Revenue	58	56
License Fee – Over time | Rest of World | Concentrate product license fee
Disaggregation of Revenue [Line Items]
Net Revenue	$ 0	$ 0