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Property, Plant and Equipment (Details Narrative) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) a $ / shares | Dec. 31, 2015 USD ($)
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges | $ 1,673 | $ 960
General Directorate [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Percentage of royalty, ranging | 1.00% |
Columbus Basin Project [Member] | July and September 2016 [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Area of land | a | 11,220 |
Sal Rica Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Area of land | a | 9,900 |
Area of unpatented mining claims | a | 3,360 |
Percentage of nsr royalty | 2.00% |
Temrezli [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Granted licenses cover area | a | 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] |  |
Gross area on mineral leases | a | 2,434 |
Net area on mineral leases | a | 2,227 |
Asset impairment charges | $ 200 | 200
Carrying value impairment | 2,200 |
Liability related to dismantling and decontaminating | $ 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 | a | 2,759 |
Net area on mineral leases | a | 2,759 |
Rosita South Property [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Gross area on mineral leases | a | 1,795 |
Net area on mineral leases | a | 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 | a | 872 |
Net area on mineral leases | a | 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 | a | 1,322 |
Net area on mineral leases | a | 1,262 |
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] |  |
Percentage of royalties on lease of sales | 10.00% |
Annual per acre royalty payable | $ / shares | $ 25 |
Lease term | 10 years |
Cebolleta Property [Member] | Neutron Energy Inc [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Area of land | a | 6,717 |
Lease term | 10 years |
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] |  |
Area of land | a | 115 |
Lease term | 10 years |
Initial payments per lease agreement | $ 1,250 |
Area of land in mineral fee interest acquired | a | 4,097 |
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] | 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% |
Butler Ranch Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges | $ 579 |
Sejita Dome Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges | 534 |
Nell Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges | 209 |
Jack Pump Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges | 191 |
Alta Mesa Este Project [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Asset impairment charges |  | 800
Mineral Property [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Mineral property expenses | $ 3,200 | $ 4,500

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