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INVENTORIES (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Inventories |  |
Material on leach pads | $ 8,631 | $ 9,188
In-process inventory | 6,401 | 5,486
Stockpiles | 2,386 | 1,168
Precious metals | 8,301 | 12,902
Materials and supplies | 3,332 | 3,207
Current Inventories | 29,051 | 31,951
Other assets |  |
Inventories |  |
Non-current portion of ore on leach pads | $ 9,300 | $ 10,400

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