Commitments and Contingencies (Narrative) (Details) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2022 USD ($) ft²	Jun. 30, 2022 USD ($) ft²
Commitments And Contingencies [Line Items]
Lease in square feet | ft²	4,419	4,419
Project Grant		$ 0.8
Grant, Accrued Liability, NonCurrent	$ 0.1	0.1
Short Term Lease Payments	0.1	0.2
Variable Lease Payment	0.1	0.1
Restricted Cash And Current Accrued Liability	4.6	4.6
Reduction In Research And Development		1.5
Contract Research Organizations [Member]
Commitments And Contingencies [Line Items]
Remaining prepayments	2.8	2.8
Contract Manufacturing Organizations [Member]
Commitments And Contingencies [Line Items]
Remaining prepayments	$ 2.5	$ 2.5