Quarterly report pursuant to Section 13 or 15(d)

INVESTMENT IN AL MASANE AL KOBRA MINING COMPANY (AMAK) (Details)

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INVESTMENT IN AL MASANE AL KOBRA MINING COMPANY (AMAK) (Details)
3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Dec. 31, 2013
USD ($)
Jun. 30, 2014
AMAK [Member]
USD ($)
Jun. 30, 2013
AMAK [Member]
USD ($)
Jun. 30, 2014
AMAK [Member]
USD ($)
Jun. 30, 2013
AMAK [Member]
USD ($)
Dec. 31, 2013
AMAK [Member]
USD ($)
Jun. 30, 2014
AMAK [Member]
USD ($)
Jun. 30, 2014
AMAK [Member]
SAR
Dec. 31, 2013
AMAK [Member]
USD ($)
Investment in Al Masane Al Kobra Mining Company Amak [Line Items]                          
Investment in AMAK                     $ 53,800,000   $ 54,100,000
Exchange rate                       3.75  
Outstanding advance to AMAK 0   0   536,000               536,000
Schedule of Equity Method Investments [Line Items]                          
Percentage investment in AMAK (in hundredths)           35.00%   35.00%          
Company's share of income (loss) reported by AMAK (331,000) 399,000 (1,018,000) 3,026,000                  
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK 337,000 337,000 674,000 674,000                  
Gain from additional equity issued by AMAK 0 3,996,000 0 3,996,000                  
Equity in income (loss) of AMAK 6,000 4,732,000 (344,000) 7,696,000                  
Results of Operations [Abstract]                          
Sales           30,431,000 15,333,000 30,698,000 46,495,000        
Gross Profit           4,045,000 8,128,000 4,684,000 18,034,000        
General, administrative and other expenses           4,982,000 7,029,000 7,570,000 9,815,000        
Net Income (loss)           (937,000) 1,099,000 (2,886,000) 8,219,000        
Financial Position [Abstract]                          
Current assets           26,558,000   26,558,000   32,923,000      
Noncurrent assets           263,961,000   263,961,000   264,997,000      
Total assets           290,519,000   290,519,000   297,920,000      
Current liabilities           16,109,000   16,109,000   22,497,000      
Long term liabilities           77,700,000   77,700,000   75,826,000      
Shareholders' equity           196,710,000   196,710,000   199,597,000      
Total liabilities and Shareholders' equity           $ 290,519,000   $ 290,519,000   $ 297,920,000