Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Additional Information (Details)

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INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Additional Information (Details)
ر.س in Millions, $ in Millions
3 Months Ended 6 Months Ended
Mar. 26, 2020
SAR (ر.س)
Mar. 26, 2020
USD ($)
shares
Sep. 22, 2019
SAR (ر.س)
Sep. 22, 2019
USD ($)
Sep. 30, 2020
SAR (ر.س)
Sep. 30, 2020
USD ($)
shares
Jun. 30, 2021
USD ($)
ر.س / $
Sep. 28, 2020
Schedule of Equity Method Investments [Line Items]                
Percentage of non-refundable deposit forfeited prior to long stop date           50.00%    
Equity method investment, shares sold (in shares) | shares           22,467,422    
Proceeds from sales deposit of equity method investments   $ 0.5            
Income taxes payable           $ 1.1    
Deposits forfeited           1.5    
Purchase price held by purchaser for tax obligations             $ 2.1  
Saudi Industrial Development Fund Limited Guarantee                
Schedule of Equity Method Investments [Line Items]                
Loan guarantee             41.00%  
AMAK foreign taxes and transaction costs                
Schedule of Equity Method Investments [Line Items]                
Income taxes payable   0.3            
AMAK                
Schedule of Equity Method Investments [Line Items]                
Proceeds from sale of investment ر.س 40 $ 10.7 ر.س 265 $ 70.0 ر.س 224 $ 59.9    
Non-refundable deposit of amount sold, percentage             5.00%  
Non-refundable deposit of amount sold             $ 3.5  
Percentage of non-refundable deposit forfeited prior to long stop date               50.00%
Equity method investment, shares sold (in shares) | shares   4,000,000            
Prepaid expense             $ 0.8  
Foreign currency exchange rate | ر.س / $             3.75  
AMAK | AMAK foreign taxes and transaction costs                
Schedule of Equity Method Investments [Line Items]                
Foreign income tax expense             $ 1.3