Income Taxes - Net Operating Loss Carryover (Details) $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)
Net operating loss carryovers
Net operating loss carryforward amount to expire	$ 20.7
Net operating loss carryforward amount that will not expire	65.9
Federal
Net operating loss carryovers
Net operating loss carryovers	86.7
California
Net operating loss carryovers
Net operating loss carryovers	$ 23.6