Income Taxes - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Net operating losses subject to expiration	$ 142.0
Net operating losses not subject to expiration	334.0
Net operating loss carryforwards	90.1
Net operating loss carryforwards, research and development	4.2
Tax Year 2016
Income Tax Contingency [Line Items]
Deduction limitation	4.0
Tax Year 2017
Income Tax Contingency [Line Items]
Deduction limitation	12.0
Tax Year 2018
Income Tax Contingency [Line Items]
Deduction limitation	12.0
Tax Year 2019
Income Tax Contingency [Line Items]
Deduction limitation	12.0
Tax Year 2020
Income Tax Contingency [Line Items]
Deduction limitation	12.0
Tax Year 2021
Income Tax Contingency [Line Items]
Deduction limitation	9.5
Latest Tax Year
Income Tax Contingency [Line Items]
Deduction limitation	4.2
Domestic Tax Authority
Income Tax Contingency [Line Items]
Net operating loss carryforwards	475.0	$ 279.0
Domestic Tax Authority | Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforwards	5.0	4.0
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carryforwards	463.0	258.0
State and Local Jurisdiction | Research Tax Credit Carryforward
Income Tax Contingency [Line Items]
Tax credit carryforwards	$ 4.0	$ 3.0