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Income Taxes - Schedule of Income Tax Expense Comprised of Current State Taxes and Foreign Taxes (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Current:    
Federal $ 0 $ 0
State (7,000) (13,000)
Foreign (1,000) (1,000)
Total current tax (expense) (8,000) (14,000)
Deferred:    
Federal 0 0
State 0 0
Foreign 0 0
Total deferred tax (expense) 0 0
Total tax (expense) $ (8,000) $ (14,000)