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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Ceded Premiums Earned | $ 152,255 | $ 100,114
Common Class A [Member] | Yellowstone Acquisition Company [Member] | IPO [Member] |  |
Stock Issued During Period, Shares, New Issues (in shares) | 13,598,898 |
Minimum [Member] |  |
Lessor, Operating Lease, Term of Contract (Month) | 1 month |
Maximum [Member] |  |
Lessor, Operating Lease, Term of Contract (Month) | 3 years |

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