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Component of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Net operating loss carryforwards $ 113,228 $ 155,503
Research credit carryforwards 33,444 12,870
Section 174 capitalization 15,308
Lease Liability 9,530 8,515
Stock Compensation 7,780 5,798
Accruals and reserves 9,089 5,792
Other 337 212
Total deferred tax assets 188,716 188,690
Less valuation allowance (178,920) (179,253)
Net deferred tax assets 9,796 9,437
Deferred tax liabilities:    
Fixed assets (2,916) (3,283)
Operating lease right-of-use assets (6,785) (6,124)
Other (95) (30)
Total deferred tax liabilities (9,796) (9,437)
Net deferred tax assets $ 0 $ 0