PROVISON FOR RECLAMATION AND REHABILITATION (Narrative) (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Guanacevi, Mexico [Member]
Statements Line Items
Provision for reclamation and rehabilitation, undiscounted amount	$ 2,280
Present value of the probability weighted future cash flows, risk free rate	2.60%
Inflation rate	2.00%
Bolanitos, Mexico [Member]
Statements Line Items
Provision for reclamation and rehabilitation, undiscounted amount	$ 1,921
Present value of the probability weighted future cash flows, risk free rate	2.50%
Inflation rate	2.00%
El Cubo, Mexico [Member]
Statements Line Items
Provision for reclamation and rehabilitation, undiscounted amount	$ 4,326
Present value of the probability weighted future cash flows, risk free rate	2.50%
Inflation rate	2.00%
El Compas, Mexico [Member]
Statements Line Items
Provision for reclamation and rehabilitation, undiscounted amount	$ 162
Present value of the probability weighted future cash flows, risk free rate	8.50%
Inflation rate	4.30%

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- Definition

The expected rate of inflation that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]]

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The discount rate used in the current estimate of the present value of the future cash flows expected to be derived from an asset or cash-generating unit.

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The amount of contractual undiscounted cash flows in relation to non-derivative financial liabilities.

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