Annual report pursuant to Section 13 and 15(d)

AMAK Asset Retirement Obligations - Summary of Changes in Provision for Mine Closure Costs (Details)

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AMAK Asset Retirement Obligations - Summary of Changes in Provision for Mine Closure Costs (Details) - AMAK - SAR (ر.س)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Dec. 31, 2018
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]      
Balance, beginning of period ر.س 16,625,347 ر.س 16,063,136 ر.س 15,519,938
Accretion expense 405,558 562,211 543,198
Balance, end of period ر.س 17,030,905 ر.س 16,625,347 ر.س 16,063,136