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Income Taxes - Operating Loss Carryforwards (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
USD ($)
Federal  
Operating Loss Carryforwards  
Operating loss carryforward $ 196,224
Research tax credits 6,166
State  
Operating Loss Carryforwards  
Operating loss carryforward 177,951
Research tax credits 1,273
Foreign  
Operating Loss Carryforwards  
Indefinite federal net operating loss carryforward $ 114,915