Mergers - Milestone Events (Details) $ in Thousands	Mar. 31, 2021 USD ($)
Business Acquisition [Line Items]
Percentage of royalty payments	2.50%
Amount of royalty payments accrued	$ 0
500 million
Business Acquisition [Line Items]
Sales based milestone payment	500,000
Milestone Payment	9,000
1 billion
Business Acquisition [Line Items]
Sales based milestone payment	1,000,000
Milestone Payment	13,500
3 billion
Business Acquisition [Line Items]
Sales based milestone payment	3,000,000
Milestone Payment	36,000
5 billion
Business Acquisition [Line Items]
Sales based milestone payment	5,000,000
Milestone Payment	72,000
ANA Merger | First Receipt of Marketing Approval from the Food and Drug Administration
Business Acquisition [Line Items]
Milestone Payment	$ 45,000