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Income Taxes (Details) - USD ($)
Dec. 31, 2022
Dec. 31, 2021
Deferred tax assets:    
Loss carryovers $ 11,652,000 $ 12,148,000
Investment in mineral property 1,669,000 1,669,000
Capitalized exploration costs 778,000 418,000
Stock option compensation expense 152,000 309,000
Unrealized loss on derivative securities 121,000 98,000
Other 65,000 91,000
Unrealized loss on short-term investments 20,000 0
Lease liability 9,000 18,000
Valuation allowance (14,309,000) (14,561,000)
Total deferred tax assets 157,000 190,000
Deferred tax liabilities:    
Unrealized gains on marketable equity securities 149,000 173,000
Lease asset 8,000 17,000
Total deferred tax liabilities 157,000 190,000
Net deferred tax liabilities $ 0 $ 0