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Income Taxes (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets:    
Loss carryovers $ 12,148,000 $ 12,636,000
Investment in mineral property 1,669,000 1,669,000
Capitalized exploration costs 418,000 410,000
Stock option compensation expense 309,000 286,000
Unrealized loss on derivative securities 98,000 148,000
Other 91,000 110,000
Lease liability 18 0
Valuation allowance (14,561,000) (15,050,000)
Total deferred tax assets 190,000 209,000
Deferred tax liabilities:    
Unrealized gains on marketable equity securities 173,000 207,000
Lease asset 17 0
Other 0 2,000
Total deferred tax liabilities 190,000 209,000
Net deferred tax liabilities $ 0 $ 0