AMAK ASSET RETIREMENT OBLIGATIONS - Deferred Mine Closure Costs (Details) - AMAK - SAR (ر.س)	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Cost	ر.س 12,842,625	ر.س 12,842,625
Accumulated amortization	(7,631,120)	(6,886,626)
Deferred mine closure costs, net	ر.س 5,211,505	ر.س 5,955,999