Quarterly report pursuant to sections 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 9 Months Ended 3 Months Ended 9 Months Ended 9 Months Ended
Sep. 30, 2013
USD ($)
Sep. 30, 2012
USD ($)
Sep. 30, 2013
USD ($)
Sep. 30, 2012
USD ($)
Sep. 30, 2013
AMAK [Member]
USD ($)
Sep. 30, 2012
AMAK [Member]
USD ($)
Sep. 30, 2013
AMAK [Member]
USD ($)
Sep. 30, 2012
AMAK [Member]
USD ($)
Dec. 31, 2012
AMAK [Member]
USD ($)
Sep. 30, 2013
AMAK [Member]
USD ($)
Sep. 30, 2013
AMAK [Member]
SAR
Dec. 31, 2012
AMAK [Member]
USD ($)
Investment in Al Masane Al Kobra Mining Company Amak [Line Items]                        
Percentage interest acquire by other investors in AMAK (in hundredths)                   10.00% 10.00%  
Shares purchased under equity method investments (in shares)                   937,500 937,500  
Share price (in dollars per share)                   $ 8.00 30  
Payments to acquire equity method investments                   $ 7,500,000    
Percentage investment in AMAK (in hundredths)                   35.00% 35.00%  
Increase in the entity's share in net assets of AMAK                   4,000,000    
Investment in AMAK                   54,400,000   37,900,000
Exchange rate                     3.75  
Additional advances to AMAK                   500,000   2,000,000
Schedule of Equity Method Investments [Line Items]                        
Company's share of income (loss) reported by AMAK 965,000 (712,000) [1] 3,991,000 (1,227,000) [1] 2,738,000 (1,929,000) 10,957,000 (3,325,000)        
Amortization of difference between Company's investment in AMAK and Company's share of net assets of AMAK 337,000 184,000 [1] 1,010,000 184,000 [1]                
Gain from additional equity issued by AMAK 0 0 [1] 3,997,000 0 [1]                
Equity in income (loss) of AMAK 1,302,000 (528,000) [1] 8,998,000 (1,043,000) [1]                
Results of Operations [Abstract]                        
Sales         17,815,000 0 64,310,000 0        
Gross Profit         6,994,000 0 25,028,000 0        
General, administrative and other expenses         4,256,000 1,929,000 14,071,000 3,325,000        
Net Income (loss) 965,000 (712,000) [1] 3,991,000 (1,227,000) [1] 2,738,000 (1,929,000) 10,957,000 (3,325,000)        
Financial Position [Abstract]                        
Current assets         43,132,000   43,132,000   32,827,000      
Noncurrent assets         263,400,000   263,400,000   261,620,000      
Total assets         306,532,000   306,532,000   294,447,000      
Current liabilities         99,262,000   99,262,000   135,111,000      
Long term liabilities         6,237,000   6,237,000   9,260,000      
Shareholders' equity         201,033,000   201,033,000   150,076,000      
Total liabilities and Shareholders' equity         $ 306,532,000   $ 306,532,000   $ 294,447,000      
[1] (restated)