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Schedule of Inventory, Current (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Concentrates and work-in-progress	$ 12,011	$ 19,900
Inventory of ore in stockpiles	8,798	7,767
Raw materials and consumables	3,063	3,004
Inventory, Net	$ 23,872	$ 30,671

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Inventory of ore in stockpiles

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- Definition

Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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-Name Accounting Standards Codification
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