Income Taxes - Operating Loss Carryforwards (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards, limited to offset taxable income in year utilized, percent	80.00%
Federal
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 89.3
Operating loss carryforwards, indefinite lived	$ 24.0
Operating loss carryforwards, carryforward period	20 years
State
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 78.6
Foreign
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	$ 0.4