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Note 3 - Investments | 12 Months Ended
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Dec. 31, 2021
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] |
3. | Investments
As of December 31, 2021 and 2020, no marketable securities investments were owned. No marketable securities were sold during the year ended December 31, 2021. Certain marketable securities were sold during the year ended December 31, 2020, for a net realized loss of $62,000.

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