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Note 7 - Leases - Future Commitments Under Long-Term Leases (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
--- | --- | ---
2020 | $ 285 |
2020 | 623 |
2020 | 908 |
2021 | 264 |
2021 | 498 |
2021 | 762 |
2022 | 168 |
2022 | 425 |
2022 | 593 |
2023 | 37 |
2023 | 238 |
2023 | 275 |
2024 | 22 |
2024 | 96 |
2024 | 118 |
Thereafter | 435 |
Thereafter |  |
Thereafter | 435 |
Total lease payments, Finance Lease | 1,211 |
Total lease payments, Operating Lease | 1,880 |
Total lease payments | 3,091 |
Less imputed interest | 338 |
Less imputed interest | 154 |
Less imputed interest | 492 |
Total | 873 | $ 924
Operating Lease, Liability, Total | 1,726 |
Total | 2,599 |
Less: current portion of obligations under leases | 247 | 236
Less: current portion of obligations under leases | 551 |
Less: current portion of obligations under leases | 798 |
Long-term portion of obligations under leases | 626 | 688
Long-term portion of obligations under leases | 1,175 |
Long-term portion of obligations under leases | $ 1,801 |

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