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Note 2 - Significant Accounting Policies (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
[3]
Dec. 31, 2023
Gain (Loss) from Litigation Settlement [2] $ 17,333 [1] $ 138,783 $ 0
Shares Prescribed Aggregation (in shares) 50,000    
[1] Includes a payment received from a class action settlement related to silver of $17,333.
[2] Represents a payment received from a class action settlement related to silver.
[3] Includes a payment received from a class action settlement related to silver of $138,783.