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Note 3 - Summary of Significant Accounting Policies - Fair Value of Marketable Securities (Details) - USD ($) | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Marketable Securities | $ 1,000,000 | $ 2,976,573
Estimate of Fair Value Measurement [Member] |  |
Marketable Securities | 1,000,000 | 2,976,573
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Marketable Securities | 1,000,000 | 2,976,573
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Marketable Securities | 0 | 0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Marketable Securities | $ 0 | $ 0

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