Commitments and Contingencies (Details) $ in Millions	Mar. 31, 2022 USD ($)
Product Liability Contingency [Line Items]
Other commitments, due in next twelve months	$ 6.0
Drug Supplier Project Plan [Member]
Product Liability Contingency [Line Items]
Other commitments	6.1
Manufacture of Drug Substance [Member]
Product Liability Contingency [Line Items]
Other commitments	3.7
Manufacturer of Prexigebersen [Member]
Product Liability Contingency [Line Items]
Other commitments	1.6
Manufacturing Development [Member]
Product Liability Contingency [Line Items]
Other commitments	0.7
Testing Services [Member]
Product Liability Contingency [Line Items]
Other commitments	$ 0.1