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Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Taxes [Line Items]        
Provision for (benefit from) income taxes $ 3,174,000 $ (207,000) $ (5,000)  
Unrecognized tax benefits 12,530,000 3,399,000 1,623,000 $ 796,000
Valuation allowance 316,056,000 73,809,000 [1]    
Increase in valuation allowance 242,300,000 32,600,000 22,100,000  
Income tax interest and penalties 0 0 $ 0  
Net operating loss carryforwards 277,453,000 $ 72,332,000 [1]    
Foreign net operating loss carryforwards 59,100,000      
Federal [Member]        
Income Taxes [Line Items]        
Federal NOLs carryover 1,096,700,000      
Net operating loss carryforrwards 1,096,700,000      
Research tax credit carryforwards 28,200,000      
State [Member]        
Income Taxes [Line Items]        
Federal NOLs carryover 559,600      
Net operating loss carryforrwards 559,600      
Research tax credit carryforwards $ 13,600,000      
[1] Revised to correct for immaterial adjustments in the disclosure, which had previously understated the net operating loss carryforwards deferred tax asset, accruals and reserves deferred tax asset, and deferred contract acquisition costs deferred tax liability as of December 31, 2020 by $7.2 million, $0.9 million, and $8.1 million, respectively. These adjustments had no impact to the consolidated balance sheets, consolidated statements of operations, or consolidated statements of cash flows as of and for the years ended December 31, 2021, 2020, or 2019. The Company evaluated the effect of the errors on the Company’s notes to the consolidated financial statements in accordance with SEC Staff Accounting Bulletin No. 99, Materiality, and concluded that the adjustments were not material to the previously issued 2020 consolidated financial statements.