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LEASES - Future Minimum Lease Payments (Details) - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Operating leases, estimated future minimum lease payments |  |
2021 | $ 181 | $ 241
2022 | 48 | 48
2023 | 35 | 35
2024 | 17 | 17
Total lease obligations | 281 | 341
Less: Amount representing interest | (18) | (24)
Present value of net minimum lease obligations | 263 | 317
Less, current portion | (186) | (225)
Long term portion | 77 | 92
Finance leases, estimated future minimum lease payments |  |
2021 | 128 | 61
2022 | 68 | 49
2023 | 38 | 38
2024 | 28 | 28
2025 | 13 | 13
Total lease obligations | 275 | 189
Less: Amount representing interest | (27) | (25)
Present value of net minimum lease obligations | 248 | 164
Less, current portion | (136) | (48)
Long term portion | 112 | 116
2021 | 309 | 302
2022 | 116 | 97
2023 | 73 | 73
2024 | 45 | 45
2025 | 13 | 13
Total lease obligations | 556 | 530
Less: Amount representing interest | (45) | (49)
Total lease liabilities | 511 | 481
Less, current portion | (322) | (273)
Long term portion | $ 189 | $ 208

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