Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Deferred tax assets, state NOLs	$ 251,400
Deferred tax assets, federal NOLs	259,000
Federal operating loss carryforwards subject to limitation	100
Federal research and development tax credit carryforwards subject to limitation	100
Valuation allowance	16,168	$ 7,308
Liability for unrecognized tax benefits	18,200
Unrecognized tax benefits, accrued interest	200	$ 200
UNITED KINGDOM
Income Tax Contingency [Line Items]
Deferred tax assets, foreign NOLs	1,500
CANADA
Income Tax Contingency [Line Items]
Deferred tax assets, foreign NOLs	300
FINLAND
Income Tax Contingency [Line Items]
Deferred tax assets, foreign NOLs	200
Federal
Income Tax Contingency [Line Items]
Federal research and development credit carry forwards	27,600
State Tax
Income Tax Contingency [Line Items]
State research and development credit carry forwards	$ 19,100