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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2015 | Sep. 30, 2016 | Sep. 30, 2015 | Dec. 31, 2015
PROPERTY AND EQUIPMENT |  |  |  |  |  |
Mine development | $ 934 |  | $ 112 | $ 2,948 | $ 449 |
Accumulated depreciation | 5,400 |  |  | 5,400 |  | $ 4,700
Total | $ 14,525 |  |  | $ 14,525 |  | $ 15,759
El Gallo 2 Properties |  |  |  |  |  |
PROPERTY AND EQUIPMENT |  |  |  |  |  |
Total cost of deposit |  | $ 1,500 |  |  |  |
Refund of deposits |  | 1,000 |  |  |  |
El Gallo 2 Properties | Mine development costs |  |  |  |  |  |
PROPERTY AND EQUIPMENT |  |  |  |  |  |
Mine development |  | $ 500 |  |  |  |

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