Annual report pursuant to Section 13 and 15(d)

Commitments and Contingencies - Future Lease Payments Due Under Operating Leases (Detail)

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Commitments and Contingencies - Future Lease Payments Due Under Operating Leases (Detail) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Future Lease Payments Due Under Operating Leases    
2021 $ 477  
2022 489  
2023 492  
2024 493  
2025 494  
Thereafter 7,305  
Total anticipated lease payments 9,750  
Less: amount representing interest (4,063)  
Present value of lease payments $ 5,687 $ 5,847