Quarterly report pursuant to Section 13 or 15(d)

GENERAL (Details)

v3.10.0.1
GENERAL (Details)
6 Months Ended
Jun. 30, 2018
segment
Noncontrolling Interest [Line Items]  
Number of operating segments 2
Al Masane Al Kobra (AMAK) [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership 33.00%
Pioche Ely Valley Mines, Inc. ("PEVM") [Member]  
Noncontrolling Interest [Line Items]  
Percentage of ownership 55.00%