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Note 7 - Marketable Securities (Tables) | 9 Months Ended
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Sep. 30, 2021
Notes Tables |
Marketable Securities [Table Text Block] |
|  | As of September 30, 2021 |  |  | As of December 31, 2020 |
Marketable securities: |  |  |  |  |  |  |  |
Amortized cost |  | $ | 114,194 |  |  | $ | 114,531 |
Unrealized gains, net |  |  | 1,134,931 |  |  |  | 592,423 |
Total fair value |  | $ | 1,249,125 |  |  | $ | 706,954 |

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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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