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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Operating Activities:    
Net Loss $ (514,000) $ (528,000)
Adjustments To Reconcile Net Loss To Net Cash Used In Operating Activities:    
Depreciation 8,000 5,000
Amortization Of Right Of Use Lease Asset 10,000 10,000
Unrealized (gain) Loss Of Marketable Equity Securities (213,000) 122,000
Unrealized Loss On Short-term Investments 51,000 25,000
Employee Stock Option Expense 13,000 28,000
Loss (gain) On Sale Of Marketable Equity Securities 81,000 (13,000)
Loss On Derivative Instruments 1,000 3,000
Other Income Ppp Loan Forgiveness 0 (10,000)
Changes In Operating Assets And Liabilities:    
Prepaid Expenses And Other Assets (14,000) 2,000
Accounts Payable And Other Current Liabilities (20,000) (26,000)
Net Cash Used In Operating Activities (597,000) (382,000)
Investing Activities:    
(purchase) Sale Of Short-term Investments, Net (1,578,000) 938,000
Cash From Sale Of Marketable Equity Securities 26,000 78,000
Purchase Of Mineral Properties (10,000) 0
Net Cash (used In) Provided By Investing Activities (1,562,000) 1,016,000
Financing Activities:    
Issuance Of Common Stock, Net 2,023,000 98,000
Stock Options Exercised 19,000 67,000
Net Cash Provided By Financing Activities 2,042,000 165,000
Net (decrease) Increase In Cash And Cash Equivalents (117,000) 799,000
Cash And Cash Equivalents, Beginning Of Period 462,000 605,000
Cash And Cash Equivalents, End Of Period $ 345,000 $ 1,404,000