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Summary of Maturity of Operating Lease Liabilities - (Detail)
$ in Thousands
Dec. 31, 2019
USD ($)
Operating Lease Liabilities Payments Due [Abstract]  
2020 $ 578
2021 596
2022 613
2023 209
Total undiscounted lease payments 1,996
Less: imputed interest (194)
Total operating lease liability 1,802
Total operating lease liability 1,802
Less: current portion of operating lease liability 483
Operating lease liability, noncurrent $ 1,319