Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Summary of Financial Position (Details)

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INVESTMENT IN AMAK AND DISCONTINUED OPERATIONS - Summary of Financial Position (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]        
Current assets $ 99,874 $ 105,896    
TOTAL ASSETS 310,399 316,833    
Current liabilities 30,638 29,584    
Stockholders' equity 199,699 204,407 $ 182,516 $ 171,443
TOTAL LIABILITIES AND EQUITY 310,399 316,833    
AMAK        
Schedule of Equity Method Investments [Line Items]        
Current assets 0 29,799    
Noncurrent assets 0 209,814    
TOTAL ASSETS 0 239,613    
Current liabilities 0 40,919    
Long term liabilities 0 79,122    
Stockholders' equity 0 119,572    
TOTAL LIABILITIES AND EQUITY $ 0 $ 239,613