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Income Taxes - Federal and State Income Tax Provision (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Current    
Federal $ 0 $ 0
State 3 3
International 0 0
Total current tax expense 3 3
Deferred    
Federal 0 0
State 0 0
International 0 0
Total deferred tax expense 0 0
Total tax expense $ 3 $ 3