Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

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Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Operating Loss Carryforwards [Line Items]    
Uncertain tax positions $ (40.3)  
Income tax examination, penalties 0.0 $ 0.0
Income tax examination, interest 0.0 0.0
Research and development    
Operating Loss Carryforwards [Line Items]    
Tax credits 12.9 $ 7.7
Federal    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards 585.7  
State and Local Jurisdiction    
Operating Loss Carryforwards [Line Items]    
Operating loss carryforwards $ 601.9