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CONVERTIBLE NOTES (Convertible Promissory Notes) (Details) - USD ($)
12 Months Ended
Apr. 16, 2019
Jan. 15, 2019
Dec. 31, 2020
Dec. 31, 2019
Jan. 29, 2019
Debt Instrument [Line Items]          
Payments on notes     $ 322,000 $ 473,000  
Conversion of convertible debt, plus interest, into common stock     2,176,000 7,553,000  
Outstanding debt     1,032,000    
Proceeds from issuance of common stock     8,929,000 6,628,000  
Proceeds from issuance of debt       2,150,000  
Crede Note          
Debt Instrument [Line Items]          
Conversion of convertible debt, plus interest, into common stock $ 1,450,000        
Number of shares converted from debt instrument (in shares) 270,699        
Outstanding debt     0 0  
Issuance of convertible notes   $ 1,450,000      
Conversion price based on closing bid price of common stock on the date prior to each conversion date (as a percent)   90.00%      
Proceeds from issuance of common stock   $ 4,000,000      
Beneficial Ownership Cap   4.99%      
Leviston Resources LLC          
Debt Instrument [Line Items]          
Conversion of convertible debt, plus interest, into common stock       $ 700,000  
Number of shares converted from debt instrument (in shares)       184,357  
Outstanding debt     $ 0 $ 0  
Settled Litigation | Leviston Resources LLC          
Debt Instrument [Line Items]          
Issuance of convertible notes         $ 700,000
Maximum | Crede Note          
Debt Instrument [Line Items]          
New shares issued (in shares)     10,000    
Percentage of daily average composite trading volume     10.00%    
Maximum | Leviston Resources LLC          
Debt Instrument [Line Items]          
Payments on notes       $ 100,000