INVENTORIES (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Inventories
Material on leach pads	$ 11,569		$ 21,003
In-process inventory	3,464		3,922
Stockpiles	1,864		635
Precious metals	1,702		1,344
Materials and supplies	5,582		4,845
Inventories	24,181		31,749
Less current portion	19,252		26,964
Long-term portion	4,929		$ 4,785
Cost Of Sales [Member]
Inventories
Inventory write-down	4,000	$ 2,600
Depreciation and depletion
Inventories
Inventory write-down	300	$ 500
Black Fox Complex
Inventories
Inventory write-down	400
Gold Bar mine
Inventories
Inventory write-down	1,400
El Gallo Project
Inventories
Inventory write-down	$ 2,500

Represents the carrying amount, net of reserves and adjustments, as of the balance sheet date, of ore on leach pads.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date, of ore stockpiled.

+ References

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Represents the carrying amount, net of reserves and adjustments, as of the balance sheet date, of precious metals.

+ References

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- Definition

Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Aggregated amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed. This amount is net of valuation reserves and adjustments.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels.

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