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Leases - Schedule of Future Payment on Sale-leaseback Financing Liability (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Leases [Abstract]  
2019 $ 414
2020 422
2021 431
2022 439
2023 448
Thereafter 3,658
Total payments 5,812
Less amount representing interest (1,431)
Total liability 4,381
Less current portion, included in accounts payable and accrued expenses (220)
Long-term portion included, in other liabilities $ 4,161