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Components of Net Deferred Tax Assets (Detail) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:        
Net operating loss carryforwards $ 480,008 $ 506,641    
Research and development credits 75,730 77,007    
Capitalized research costs 26,872 14,225    
Milestone rights 804 1,006    
Accrued expenses 4,302 3,760    
Loss on purchase commitment 22,413 22,806    
Non-qualified stock option expense 3,364 3,559    
Capitalized patent costs 4,798 6,720    
Other 4,973 3,405    
Lease liability 3,578 1,280    
Interest expense limitation 0 2,782    
Depreciation 21,638 21,134    
Deferred product revenue and costs 11,347 346    
Sale of future royalties 38,059 34,848    
Total deferred tax assets 697,886 699,519    
Valuation allowance (694,369) (698,228) $ (705,034) $ (695,094)
Net deferred tax assets 3,517 1,291    
Deferred tax liabilities:        
Right of use asset (3,334) (1,121)    
Other prepaids (204) (176)    
Total deferred tax liabilities (3,538) (1,297)    
Net deferred tax assets $ (21) $ (6)