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Property, Plant and Equipment (Details Narrative)
$ / shares in Units, $ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
a
Trench
mi
$ / shares
Dec. 31, 2014
USD ($)
Property, Plant and Equipment [Line Items]    
Asset impairement charges | $ $ 960 $ 160
General Directorate [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalty, ranging 1.00%  
Temrezli [Member]    
Property, Plant and Equipment [Line Items]    
Granted licenses cover area 13,490  
Temrezli [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalty, ranging 2.00%  
Temrezli [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalty, ranging 16.00%  
Kingsville Dome [Member]    
Property, Plant and Equipment [Line Items]    
Net area on mineral leases 2,227  
Asset impairement charges | $ $ 200 200
Carrying value impairement | $ $ 2,200  
Kingsville Dome [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 6.25%  
Annual per acre royalty payable | $ / shares $ 10  
Kingsville Dome [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 9.375%  
Annual per acre royalty payable | $ / shares $ 30  
Rosita Project [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 3,377  
Net area on mineral leases 3,377  
Rosita South Property [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 1,795  
Net area on mineral leases 1,479  
Rosita [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 6.25%  
Annual per acre royalty payable | $ / shares $ 10  
Rosita [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 18.25%  
Annual per acre royalty payable | $ / shares $ 30  
Mineral sales price per pound | $ / shares $ 80.00  
Vasquez Project [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 872  
Net area on mineral leases 872  
Vasquez Project [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 6.25%  
Mineral sales price per pound | $ / shares $ 25.00  
Vasquez Project [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 10.25%  
Mineral sales price per pound | $ / shares $ 40.00  
Butler Ranch Exploration Project [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 2,653  
Net area on mineral leases 2,592  
Butler Ranch Exploration Project [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Annual per acre royalty payable | $ / shares $ 10  
Lease term 8 years  
Butler Ranch Exploration Project [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Annual per acre royalty payable | $ / shares $ 25  
Lease term 10 years  
Churchrock [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 3,458  
Net area on mineral leases 3,458  
Churchrock [Member] | Section 17 and Mancos [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 33.00%  
Percentage of overriding royalty obligation 2.00%  
payment of sliding scale range 25.00%  
Churchrock [Member] | Minimum [Member] | Section 17 and Mancos [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 5.00%  
Churchrock [Member] | Maximum [Member] | Section 17 and Mancos [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 6.25%  
Crownpoint [Member]    
Property, Plant and Equipment [Line Items]    
Gross area on mineral leases 640  
Net area on mineral leases 556  
Annual maintenance fee per claim | $ / shares $ 155  
Crownpoint [Member] | Gallup [Member]    
Property, Plant and Equipment [Line Items]    
Distance of property from a specified location | mi 35  
Crownpoint [Member] | Churchrock Deposits [Member]    
Property, Plant and Equipment [Line Items]    
Distance of property from a specified location | mi 22  
Crownpoint [Member] | Section 9 Northwest [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of section the Company holds mineral rights 0.25%  
Number of unpatented lode mining claims | Trench 9  
Crownpoint [Member] | Section 24 Southwest [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of section the Company holds mineral rights 0.25%  
Number of unpatented lode mining claims | Trench 10  
Crownpoint [Member] | Section 25 North East [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of section the Company holds mineral rights 0.25%  
Number of unpatented lode mining claims | Trench 8  
Crownpoint [Member] | Section 24 Southeast [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of section the Company holds mineral rights 0.25%  
Number of unpatented lode mining claims | Trench 2  
Percentage of interest earned in project 40.00%  
Area of land in mineral fee interest acquired 140  
Percentage of mineral fee interest Company owns on additional acres 100.00%  
Additional area of land in fee interest acquired 20  
Cebolleta Property [Member] | Neutron Energy Inc [Member]    
Property, Plant and Equipment [Line Items]    
Lease term 10 years  
Area covered under lease 6,717  
Initial payments per lease agreement | $ $ 5,000  
Amount used in the calculation of recoverable reserve payment per unit 1.00  
Annual advance royalties previously paid | $ $ 500  
Royality payable | $ $ 1,500  
Cebolleta Property [Member] | Minimum [Member] | Neutron Energy Inc [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 4.50%  
Cebolleta Property [Member] | Maximum [Member] | Neutron Energy Inc [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 8.00%  
Feasibility study term 6 years  
Annual advance royalties previously paid | $ $ 5,000  
Amount of deduction to recoverable reserve payment | $ $ 6,500  
Juan Tafoya Property [Member]    
Property, Plant and Equipment [Line Items]    
Lease term 10 years  
Area of land in mineral fee interest acquired 4,097  
Initial payments per lease agreement | $ $ 1,250  
Annual base rent per acre | $ / shares $ 75  
Reduction of market value per pound | $ / shares $ 25  
Juan Tafoya Property [Member] | First Five Year [Member]    
Property, Plant and Equipment [Line Items]    
Annual rental payments | $ $ 200  
Juan Tafoya Property [Member] | Second Five Year [Member]    
Property, Plant and Equipment [Line Items]    
Annual rental payments | $ $ 300  
Juan Tafoya Property [Member] | Albuquerque [Member]    
Property, Plant and Equipment [Line Items]    
Distance of property from a specified location | mi 45  
Juan Tafoya Property [Member] | Laguna [Member]    
Property, Plant and Equipment [Line Items]    
Distance of property from a specified location | mi 25  
Juan Tafoya Property [Member] | Minimum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 4.65%  
Juan Tafoya Property [Member] | Maximum [Member]    
Property, Plant and Equipment [Line Items]    
Percentage of royalties on lease of sales 6.50%  
Alta Mesa Este Exploration Project [Member]    
Property, Plant and Equipment [Line Items]    
Asset impairement charges | $ $ 800  
Mineral Property [Member]    
Property, Plant and Equipment [Line Items]    
Mineral property expenses | $ $ 4,500 $ 3,500