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INVENTORIES (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
INVENTORIES |  |
Material on leach pads | $ 37,328 | $ 14,961
In-process inventory | 3,847 | 3,446
Stockpiles | 1,384 | 1,272
Precious metals | 1,038 | 3,421
Materials and supplies | 4,382 | 3,530
Inventories | 47,979 | 26,630
Current portion | 38,376 | 22,039
Long-term portion | 9,603 | 4,591
Inventory write-down | $ 1,700 |

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