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INVENTORY (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020 | Dec. 31, 2020
Inventory: |  |  |  |  |
Used serviceable materials | $ 68,222 |  | $ 68,222 |  | $ 63,277
Work-in-process | 13,622 |  | 13,622 |  | 20,611
Whole assets | 76,236 |  | 76,236 |  | 56,767
Inventory | 158,080 |  | 158,080 |  | 140,655
Less short term | (80,106) |  | (80,106) |  | (85,192)
Long term | 77,974 |  | 77,974 |  | $ 55,463
Inventory Adjustments |  |  |  |  |
Inventory reserve | 4,800 | $ 12,900 | 4,800 | $ 12,900 |
Inventory Scrap loss reserve |  |  | 5,033 | 13,427 |
Scrap |  |  |  |  |
Inventory Adjustments |  |  |  |  |
Inventory Scrap loss reserve | $ 100 | $ 100 | $ 200 | $ 500 |

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