Post-effective amendment to a registration statement that is not immediately effective upon filing

Income Taxes - Additional Information (Detail)

v3.22.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Testing Period for ownership change 3 years  
Threshold ownership percentage 50.00%  
Income tax examination likelihood of unfavorable settlement The tax benefit is measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement.  
Unrecognized tax benefits income tax penalties and interest accrued $ 0 $ 0
Deferred tax assets, valuation allowance 294,150 245,633
CARES Act [Member]    
Payroll taxes deferred during the period   $ 1,800
Payment of deferred payroll taxes 900  
U.S. Federal Net Operating Loss Carryforwards [Member]    
Operating loss carry-forwards 1,900  
U.S. Federal Net Operating Loss Carryforwards [Member] | Indefinite Period [Member]    
Operating loss carry-forwards 813,100  
U.S. State Net Operating Loss Carryforwards [Member]    
Operating loss carry-forwards 524,900  
Foreign Net Operating Loss Carryforwards [Member]    
Operating loss carry-forwards 294,300  
Domestic Tax Authority [Member]    
Deferred tax assets, valuation allowance 214,500  
Foreign Tax Authority [Member]    
Deferred tax assets, valuation allowance 79,600  
U.S. Federal Research Tax Credit Carryforwards [Member]    
Tax credit carry-forward, amount 6,300  
California Research Tax Credit Carryforwards [Member]    
Tax credit carry-forward, amount $ 7,100