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Note 3 - Cash, Cash Equivalents, and Restricted Cash (Tables) | 3 Months Ended
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Mar. 31, 2022
Notes Tables |
Restrictions on Cash and Cash Equivalents [Table Text Block] |
|  | March 31, |  |  | December 31, |
|  | 2022 |  |  | 2021 |
Cash and cash equivalents |  | $ | 86,605,055 |  |  | $ | 72,508,528 |
Funds held as collateral |  |  | 15,718,591 |  |  |  | 9,185,872 |
Total Cash, Cash Equivalents, and Restricted Cash as Presented in the Consolidated Statement of Cash Flows |  | $ | 102,323,646 |  |  | $ | 81,694,400 |

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