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Summary of Significant Accounting Policies - Summary of Liabilities Under Contract Contain Operating Leases (Detail)
$ in Thousands
Sep. 30, 2020
USD ($)
Accounting Policies [Abstract]  
October 1 to December 31, 2020 $ 647
2021 2,329
2022 529
2023 182
Total lease payments 3,687
Imputed interest (133)
Total lease liability $ 3,554