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Intangible Assets, Net - Schedule of Future Amortization of Intellectual Property and Customer Lists (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
2022 $ 53  
2023 53  
2024 53  
2025 4  
2026 4  
Thereafter 28  
Finite-Lived Intangible Assets, Net, Total $ 196 $ 320