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Note 8 - Leases - Future Commitments Under Long-term Leases (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
2022, finance | $ 198 |
2022, operating | 597 |
2022, total | 795 |
2023, finance | 139 |
2023, operating | 491 |
2023, total | 630 |
2024, finance | 129 |
2024, operating | 315 |
2024, total | 444 |
2025, finance | 64 |
2025, operating | 253 |
2025, total | 317 |
2026, finance | 39 |
2026, operating | 84 |
2026, total | 123 |
Thereafter, finance | 390 |
Thereafter, operating | 0 |
Thereafter, total | 390 |
Total lease payments, finance | 959 |
Total lease payments, operating | 1,740 |
Total lease payments, total | 2,699 |
Less imputed interest, finance | 296 |
Less imputed interest, operating | 142 |
Less imputed interest, total | 438 |
Total, finance | 663 | $ 893
Total, operating | 1,598 | 1,728
Total, total | 2,261 |
Less: current portion of obligations under leases, finance | 167 | 333
Less: current portion of obligations under leases, operating | 534 | 529
Less: current portion of obligations under leases, total | 701 |
Long-term portion of obligations under leases, finance | 496 | 560
Long-term portion of obligations under operating leases | 1,064 | $ 1,199
Long-term portion of obligations under leases, total | $ 1,560 |

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