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Lessor Sales-Type Leases - Estimated Future Maturities of Customer Sales-Type Lease Receivables (Detail)
$ in Thousands
Dec. 31, 2020
USD ($)
Leases [Abstract]  
Year ending December 31, 2021 $ 367
Year ending December 31, 2022 338
Year ending December 31, 2023 107
Year ending December 31, 2024 27
Lease receivable $ 839