Commitments and Contingencies (Details) $ in Millions	Dec. 31, 2021 USD ($)
Product Liability Contingency [Line Items]
Other commitments, due in next twelve months	$ 2.6
Drug Supplier Project Plan [Member]
Product Liability Contingency [Line Items]
Other commitments	3.2
Manufacturer of Prexigebersen [Member]
Product Liability Contingency [Line Items]
Other commitments	1.6
Manufacture of Drug Substance [Member]
Product Liability Contingency [Line Items]
Other commitments	1.2
Manufacturing Development [Member]
Product Liability Contingency [Line Items]
Other commitments	0.3
Testing Services [Member]
Product Liability Contingency [Line Items]
Other commitments	$ 0.1