Impairment of Non-Current Assetes (Tables)

12 Months Ended

Dec. 31, 2019

Impairment and Reversal of Impairment and Goodwill [Abstract]

Sensitivity analysis of metal prices

Metal prices used at December 31, 2019:

Metal Prices	2020-2022 average
Silver price - $/oz.	$17.94
Gold price - $/oz.	$1,474

Metal prices used at December 31, 2018: 

Metal Prices	2019-2022 average
Silver price - $/oz.	$17.07
Gold price - $/oz.	$1,300