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Leases - Future minimum payments for finance and operating leases (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Finance leases |  |
2021 | $ 251 |
2022 | 251 |
2023 | 84 |
Total future minimum lease payments | 586 |
Amounts representing interest | (49) |
Total finance lease liabilities | 537 | $ 640
Operating leases |  |
2021 | 2,293 |
2022 | 2,085 |
2023 | 1,981 |
2024 | 1,255 |
2025 | 738 |
Thereafter | 1,913 |
Total future minimum lease payments | 10,265 |
Amounts representing interest | (1,011) |
Total operating lease liabilities | $ 9,254 | $ 8,864

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