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Cash and Cash Equivalents and Short-term Investments (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Financial institutions minimum net worth   $ 1,000,000,000  
Trading securities, cost   59,000  
Total short term, cost   59,000  
Total short term   $ 79,000  
Golden Tag      
Investment shares held (in shares)   7,500,000 0
Net proceeds from the sale of shares $ 113,000    
Loss on sale of shares     $ 217,000
Trading securities      
Trading securities, cost   $ 59,000  
Sale of Santa Maria Property | Options Agreement | Fabled Copper Corp.      
Consideration Received in Shares | shares   1,000,000  
Percentage of interest claims   100.00%  
Estimated Fair Value.      
Trading securities   $ 79,000  
Total short term   79,000  
Estimated Fair Value. | Trading securities      
Trading securities   79,000  
Carrying Value.      
Trading securities   79,000  
Total short term   79,000  
Carrying Value. | Trading securities      
Trading securities   $ 79,000