Income Taxes - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Change in valuation allowance	$ 36,000,000.0
Change in deferred tax asset valuation allowance through expense	35,800,000	$ 117,000	$ 36,224,000	$ 0
Reduction of OIC related to the change in valuation allowance	$ 200,000
Valuation allowance		37,472,000	37,345,000	1,200,000
Unrecognized tax benefits		6,891,000	5,792,000	5,412,000	$ 3,807,000
Unrecognized tax benefits, which would affect the effective tax rate		7,100,000	6,000,000.0	5,600,000
Unrecognized tax benefit accrued interest and penalties		300,000	300,000	300,000
U.S.
Income Tax Contingency [Line Items]
Net operating loss carryforwards		88,600,000
State
Income Tax Contingency [Line Items]
Net operating loss carryforwards		136,800,000
Other Current Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits		0	0	0
Other Noncurrent Liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits		$ 1,000,000.0	$ 700,000	$ 600,000