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Note 2 - Summary of Significant Accounting Policies (Details Textual)
 12 Months Ended
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Assets $ 728,345,729 $ 768,207,092
Liabilities 165,626,276 151,754,831
Other Investment Income (Loss) $ 29,059,717 6,132,791
Number of Reporting Units 4  
Goodwill $ 182,380,136 182,380,136
Ceded Premiums Earned 4,300,000 3,300,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 0 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued $ 0 0
Broadband and Asset Management Acquisitions [Member]    
Goodwill   2,900,000
Minimum [Member]    
Property, Plant and Equipment, Useful Life (Year) 4 years  
Finite-Lived Intangible Asset, Useful Life (Year) 5 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  
The 24th Street Funds, Special Purpose Entities [Member]    
Investment Owned, Fair Value $ 46,900,000 64,900,000
Other Investment Income (Loss) 8,000,000  
Fund Distributions 26,000,000  
Variable Interest Entity, Primary Beneficiary [Member]    
Assets 48,700,000 96,500,000
Liabilities $ 27,000 $ 132,000