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Note 4 - Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Recurring Basis Using Significant Unobservable Inputs (Details) - Fair Value, Recurring [Member] - Fair Value, Inputs, Level 3 [Member]
12 Months Ended
Dec. 31, 2024
USD ($)
Corporate Debt Securities [Member]  
Fair value, beginning of period $ 169,600
Principal payment 0
Acquisition 0
Investment related gains (losses), net 0
Fair value, end of period 169,600
Collateralized Mortgage-Backed Securities [Member]  
Fair value, beginning of period 487,500
Principal payment 0
Acquisition 0
Investment related gains (losses), net (143,750)
Fair value, end of period 343,750
Term Loans [Member]  
Fair value, beginning of period 17,052,420
Principal payment (9,751,858)
Acquisition 5,359,575
Investment related gains (losses), net 128,167
Fair value, end of period 12,788,304
Other Invested Assets [Member]  
Fair value, beginning of period 2,239,683
Principal payment (2,140,666)
Acquisition 230,914
Investment related gains (losses), net (216,250)
Fair value, end of period $ 1,109,606