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Summary of Significant Accounting Policies (Details) (USD $)
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Dec. 31, 2011
Oil & Gas properties [Abstract]          
Unproved $ 10,814,000   $ 10,814,000   $ 17,098,000
Wells in progress 201,000   201,000   2,909,000
Proved 117,636,000   117,636,000   99,496,000
Oil & Gas properties 128,651,000   128,651,000   119,503,000
Less accumulated depreciation depletion and amortization (39,641,000)   (39,641,000)   (28,561,000)
Net book value 89,010,000   89,010,000   90,942,000
Mining properties 20,739,000   20,739,000   20,739,000
Building, land and equipment 8,482,000   8,482,000   8,474,000
Less accumulated depreciation (3,966,000)   (3,966,000)   (3,746,000)
Net book value 4,516,000   4,516,000   4,728,000
Net properties and equipment 114,265,000   114,265,000   116,409,000
Oil and Gas Properties [Abstract]          
Capitalized Costs, Proved Properties 11,000,000   11,000,000   20,000,000
Capitalized costs related to unevaluated properties are included in the amortization base 0   0   0
Period after which costs will be added to the full cost amortization pool for properties     2 years    
Percentage of discount used for future net revenue (in hundredths)     10.00%    
Period prior to the end of reporting period and costs     12 months    
Number of cost centers for quarterly ceiling test for oil and gas     1    
Price per barrel for oil at ceiling test (in dollars per barrel)     94.97    
Price per barrel for natural gas at ceiling test (in dollars per barrel)     2.826    
Impairment of oil and gas properties 0 0 523,000 0  
Mineral Properties [Abstract]          
Costs associated with Mount Emmons beginning of year     20,739,000 21,077,000 21,077,000
Development costs     0   16,000
Option payment from Thompson Creek     0   (354,000)
Costs at the end of the period $ 20,739,000   $ 20,739,000   $ 20,739,000
Minimum [Member]
          
Property, Plant and Equipment [Line Items]          
Estimated useful lives     3 years    
Maximum [Member]
          
Property, Plant and Equipment [Line Items]          
Estimated useful lives     45 years