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Note 6 - Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2022
Notes Tables |
Marketable Securities [Table Text Block] |
|  | As of March 31, 2022 |  |  | As of December 31, 2021 |
Marketable securities: |  |  |  |  |  |  |  |
Amortized cost |  | $ | 115,529 |  |  | $ | 114,159 |
Unrealized gains, net |  |  | 1,219,344 |  |  |  | 1,097,580 |
Total fair value |  | $ | 1,334,873 |  |  | $ | 1,211,739 |

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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
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