Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK - Equity in the Income or Loss of Equity Method Investment (Details)

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INVESTMENT IN AMAK - Equity in the Income or Loss of Equity Method Investment (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]      
Equity in earnings (losses) of AMAK $ (59) $ 230  
AMAK      
Schedule of Equity Method Investments [Line Items]      
AMAK Net Loss $ (1,183) $ (319)  
Percentage of Ownership 33.40% 33.41% 33.44%
Company's share of loss reported by AMAK $ (395) $ (107)  
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK 337 337  
Equity in earnings (losses) of AMAK $ (59) $ 230