SEGMENT DISCLOSURES (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Exploration [Member]
Statements Line Items
Costs incurred in Chile	$ 777	$ 448

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'function of expense' form for its analysis of expenses.

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Period Type:	duration