Income Taxes - Operating Loss Carryforwards (Details) $ in Millions	Dec. 31, 2022 USD ($)
Federal
Operating loss carryforwards
Net operating loss	$ 294.8
Federal | Tax Years 2028 through 2041
Operating loss carryforwards
Net operating loss	150.6
Tax credit carryforwards	9.8
Federal | No expiration
Operating loss carryforwards
Net operating loss	144.2
State
Operating loss carryforwards
Net operating loss	288.5
State | Tax Years 2028 through 2041
Operating loss carryforwards
Net operating loss	288.5
Tax credit carryforwards	$ 2.9