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Short-term and long-term debt (Future minimum lease payments under capital leases) (Detail)
$ in Thousands
Dec. 31, 2018
USD ($)
Future Minimum Lease Payments Under Capital Leases [Line Items]  
-2019 $ 48
-2020 9
-2021 3
-2022 0
-2023 0
Subtotal 60
Less interest expense (1)
Total $ 59