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 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Jun. 29, 2019
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Mar. 30, 2018
Schedule of Equity Method Investments [Line Items]                  
Equity in (losses) earnings of AMAK $ (91) $ 228 $ (150) $ 458          
AMAK                  
Schedule of Equity Method Investments [Line Items]                  
AMAK Net Loss $ (1,292) $ (326) $ (2,475) $ (646)          
Percentage of Ownership 33.30% 33.41% 33.30% 33.41% 33.40% 33.29% 33.40% 33.41% 33.44%
Company's share of loss reported by AMAK $ (429) $ (109) $ (824) $ (216)          
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK 337 337 674 674          
Equity in (losses) earnings of AMAK $ (91) $ 228 $ (150) $ 458