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GEOGRAPHIC AND SEGMENT INFORMATION - Schedule of Segment Reporting Information (Details) - USD ($)
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2019
Long-term assets by reportable segments      
Net property, plant and equipment $ 20,337,000 $ 20,553,000  
Restricted cash 3,797,000 3,732,000  
Operating lease right-of-use assets 484,000   $ 595,870
Notes receivable, non-current   1,493,000  
Total long-term assets 24,600,000 25,800,000  
Statement of Operations, Loss before taxes      
Mineral property expenses 2,852,000 3,538,000  
General and administrative 6,086,000 7,009,000  
Arbitration expenses 1,378,000 348,000  
Acquisition related expenses   333,000  
Accretion of asset retirement costs 390,000 993,000  
Depreciation and amortization 73,000 116,000  
Impairment of uranium properties 143,000 23,712,000  
Total operating expenses 10,922,000 36,049,000  
Loss from operations (10,922,000) (36,049,000)  
Other income (loss) 357,000 365,000  
Loss before taxes (10,565,000) (35,684,000)  
Long Term Assets      
Long-term assets by reportable segments      
Net property, plant and equipment 20,337,000 20,553,000  
Restricted cash 3,797,000 3,732,000  
Operating lease right-of-use assets 484,000    
Notes receivable, non-current   1,493,000  
Total long-term assets 24,618,000 25,778,000  
Corporate | Long Term Assets      
Long-term assets by reportable segments      
Net property, plant and equipment 114,000 162,000  
Restricted cash  
Operating lease right-of-use assets 463,000    
Notes receivable, non-current    
Total long-term assets 577,000 162,000  
Corporate | Operating Results      
Statement of Operations, Loss before taxes      
General and administrative 4,019,000 4,638,000  
Arbitration expenses 1,378,000 348,000  
Acquisition related expenses   333,000  
Depreciation and amortization 48,000 5,000  
Total operating expenses 5,445,000 5,324,000  
Loss from operations (5,445,000) (5,324,000)  
Other income (loss) 367,000 196,000  
Loss before taxes (5,078,000) (5,128,000)  
Uranium | Long Term Assets      
Long-term assets by reportable segments      
Net property, plant and equipment 11,251,000 11,418,000  
Restricted cash 3,787,000 3,722,000  
Operating lease right-of-use assets 21,000    
Notes receivable, non-current   1,493,000  
Total long-term assets 15,059,000 16,633,000  
Uranium | Operating Results      
Statement of Operations, Loss before taxes      
Mineral property expenses 2,413,000 2,917,000  
General and administrative 1,724,000 1,846,000  
Accretion of asset retirement costs 390,000 993,000  
Depreciation and amortization 25,000 110,000  
Impairment of uranium properties 143,000 23,712,000  
Total operating expenses 4,695,000 29,578,000  
Loss from operations (4,695,000) (29,578,000)  
Other income (loss) (10,000) 168,000  
Loss before taxes (4,705,000) (29,410,000)  
Lithium | Long Term Assets      
Long-term assets by reportable segments      
Net property, plant and equipment  
Restricted cash  
Operating lease right-of-use assets    
Notes receivable, non-current    
Total long-term assets  
Lithium | Operating Results      
Statement of Operations, Loss before taxes      
Mineral property expenses 237,000 481,000  
Total operating expenses 237,000 481,000  
Loss from operations (237,000) (481,000)  
Loss before taxes (237,000) (481,000)  
Graphite | Long Term Assets      
Long-term assets by reportable segments      
Net property, plant and equipment 8,972,000 8,973,000  
Restricted cash 10,000 10,000  
Operating lease right-of-use assets    
Notes receivable, non-current    
Total long-term assets 8,982,000 8,983,000  
Graphite | Operating Results      
Statement of Operations, Loss before taxes      
Mineral property expenses 202,000 140,000  
General and administrative 343,000 525,000  
Depreciation and amortization   1,000  
Total operating expenses 545,000 666,000  
Loss from operations (545,000) (666,000)  
Other income (loss)   1,000  
Loss before taxes $ (545,000) $ (665,000)