Quarterly report pursuant to Section 13 or 15(d)

Leases - Summary of Maturities of Operating Lease Liabilities (Detail)

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Leases - Summary of Maturities of Operating Lease Liabilities (Detail)
$ in Thousands
Mar. 31, 2019
USD ($)
Leases [Abstract]  
2019 (from April to December) $ 471
2020 647
2021 667
2022 686
2023 707
Thereafter 30
Total undiscounted future minimum lease payments 3,208
Less: Imputed interest 798
Lease liabilities 2,410
Less: Current portion of operating lease liability 357
Long-term portion of operating lease liability $ 2,053