Quarterly report pursuant to Section 13 or 15(d)

SUBSEQUENT EVENTS (Details)

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SUBSEQUENT EVENTS (Details) - AMAK
ر.س in Millions, $ in Millions
Jul. 28, 2020
USD ($)
shares
Mar. 26, 2020
USD ($)
shares
Mar. 26, 2020
SAR (ر.س)
shares
Jul. 27, 2020
Jun. 30, 2020
Dec. 31, 2019
Subsequent Event [Line Items]            
Proceeds from sale of investment   $ 10.7 ر.س 40      
Equity method investment, shares sold (in shares)   4,000,000 4,000,000      
Percentage of ownership   33.30% 33.30%   28.30% 33.30%
Subsequent Event            
Subsequent Event [Line Items]            
Proceeds from sale of investment | $ $ 2.5          
Equity method investment, shares sold (in shares) 1,000,000          
Percentage of ownership 27.00%     28.30%