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Note 2 - Summary of Significant Accounting Policies (Details Textual) |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2022 USD ($) | Jan. 25, 2022 shares | Oct. 01, 2021 USD ($) | Oct. 26, 2020 shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Accounts Receivable, Allowance for Credit Loss, Current |  |  |  |  | $ 111,379 | $ 121,022
Number of Reporting Units |  |  |  |  | 4 |
Goodwill, Impairment Loss | $ 0 |  | $ 0 |  |  |
Goodwill, Ending Balance |  |  |  |  | $ 179,463,522 | 151,336,976
Ceded Premiums Earned |  |  |  |  | 1,230,505 | 652,885
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total |  |  |  |  | 0 | 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total |  |  |  |  | 0 | 0
Yellowstone Acquisition Company [Member] | Common Class A [Member] |  |  |  |  |  |
Stock Redeemed or Called During Period, Shares (in shares) | shares |  | 12,061,401 |  |  |  |
Yellowstone Acquisition Company [Member] | Common Class A [Member] | IPO [Member] |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues (in shares) | shares |  |  |  | 13,598,898 |  |
Tammy Lynn Outdoor, LLC, Key Outdoor, Inc and Waitt Outdoor, LLC [Member] |  |  |  |  |  |
Goodwill, Ending Balance |  |  |  |  | $ 26,100,000 | 26,000,000
Minimum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  | 4 years |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  | 2 years |
Lessor, Operating Lease, Term of Contract (Month) |  |  |  |  | 1 month |
Maximum [Member] |  |  |  |  |  |
Property, Plant and Equipment, Useful Life (Year) |  |  |  |  | 20 years |
Finite-Lived Intangible Asset, Useful Life (Year) |  |  |  |  | 50 years |
Lessor, Operating Lease, Term of Contract (Month) |  |  |  |  | 3 years |
Billboard Rentals [Member] |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  |  |  |  | $ 101,924 | 110,721
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  | 39,244,726 | 31,499,235
Broadband Services [Member] |  |  |  |  |  |
Accounts Receivable, Allowance for Credit Loss, Current |  |  |  |  | 9,455 | 10,301
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  | 28,627,271 | 15,234,266
Production Services [Member] |  |  |  |  |  |
Revenue from Contract with Customer, Including Assessed Tax |  |  |  |  | $ 2,140,762 | $ 1,677,415

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