Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AMAK (Details)

v3.3.0.814
INVESTMENT IN AMAK (Details)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2015
USD ($)
SAR / $
Sep. 30, 2014
USD ($)
Sep. 30, 2015
USD ($)
SAR / $
Sep. 30, 2014
USD ($)
Dec. 31, 2014
USD ($)
Schedule of Equity Method Investments [Line Items]          
Exchange rate | SAR / $ 3.75   3.75    
Company's share of loss reported by AMAK $ (2,391) $ (680) $ (3,375) $ (1,698)  
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK 337 337 1,011 1,011  
Equity in loss of AMAK (2,054) (343) (2,364) (687)  
AMAK [Member]          
Investment in Al Masane Al Kobra Mining Company Amak [Line Items]          
Investment in AMAK $ 50,700   $ 50,700   $ 53,000
AMAK [Member]          
Schedule of Equity Method Investments [Line Items]          
Percentage investment in AMAK 35.00%   35.00%   35.00%
Results of Operations [Abstract]          
Sales $ 19,874 16,957 $ 38,458 47,655  
Gross Profit (Loss) (2,711) 1,785 35 6,469  
General, administrative and other expenses 4,067 3,714 9,605 11,285  
Net Loss (6,778) (1,929) (9,570) (4,816)  
Depreciation, depletion and amortization 4,235 5,930 15,250 16,744  
Net Income (Loss) before depreciation, depletion and amortization (2,543) $ 4,001 5,680 $ 11,928  
Financial Position [Abstract]          
Current assets 31,904   31,904   $ 17,782
Noncurrent assets 261,623   261,623   265,584
Total assets 293,527   293,527   283,366
Current liabilities 21,216   21,216   23,034
Long term liabilities 89,156   89,156   67,598
Shareholders' equity 183,155   183,155   192,734
Total liabilities and Shareholders' equity $ 293,527   $ 293,527   $ 283,366