Annual report pursuant to Section 13 and 15(d)

AMAK ASSET RETIREMENT OBLIGATIONS - Deferred Mine Closure Costs (Details)

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AMAK ASSET RETIREMENT OBLIGATIONS - Deferred Mine Closure Costs (Details) - AMAK - SAR (ر.س)
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]    
Cost ر.س 12,842,625 ر.س 12,842,625
Accumulated amortization (6,886,626) (6,142,126)
Deferred mine closure costs, net ر.س 5,955,999 ر.س 6,700,499