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Income Taxes - Income Taxes Effect of Each Type of Temporary Difference Comprising Net Differed Tax Asset (Detail) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:      
Net operating losses $ 154,086 $ 136,862  
Stock-based compensation 9,929 11,616  
Tax credits 2,409 2,639  
Capitalized R&D   4,723  
Lease liability 1,971 2,583  
Other reserves and accrued liabilities 7,916 11,895  
Gross deferred tax assets 176,311 170,318  
Less: valuation allowance (171,793) (165,378) $ (160,295)
Total deferred tax assets 4,518 4,940  
Deferred tax liabilities:      
Depreciation and amortization (3,050) (3,337)  
Lease asset (1,468) (1,603)  
Total deferred tax liabilities (4,518) (4,940)  
Net deferred tax assets $ 0 $ 0