Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 200	$ 300	$ 200
Income Tax Expense (Benefit)	17	$ 148	$ 0
Domestic Tax Authority
Income Tax Contingency [Line Items]
Operating loss carryforwards	315,000
Operating loss carryforwards, not subject to expiration	260,900
Unrecognized tax benefits	200
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	54,100
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Operating loss carryforwards	308,200
Foreign Tax Authority
Income Tax Contingency [Line Items]
Operating loss carryforwards	65,200
Unrecognized tax benefits	100
Research Tax Credit Carryforward | Domestic Tax Authority
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	4,300
Research Tax Credit Carryforward | State and Local Jurisdiction
Income Tax Contingency [Line Items]
Tax credit carryforward, amount	$ 1,400