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Short-term and long-term debt - Future minimum lease payments under capital leases (Details)
$ in Thousands
Jun. 30, 2019
USD ($)
Short-term and long-term debt  
-2020 $ 18
-2021 6
-2022 0
-2023 0
-2024 0
Subtotal 24
Less interest expense (1)
Total $ 23