Note 2 - Investments - Gross Unrealized Losses (Details) - USD ($)	Jun. 30, 2024	Dec. 31, 2023
Available-for-sale securities, less than 12 months, fair value	$ 8,537,003	$ 14,800,459
Available-for-sale securities, less than 12 months, unrealized loss	(277,618)	(466,864)
Available-for-sale securities, fair value	43,136,650	48,348,351
Debt Securities, Gross Unrealized Loss	(5,165,696)	(4,927,710)
Available-for-sale securities, greater than 12 months, fair value	34,599,647	33,547,892
Available-for-sale securities, greater than 12 months, unrealized loss	(4,888,078)	(4,460,846)
US Treasury Securities [Member]
Available-for-sale securities, less than 12 months, fair value	0	724,668
Available-for-sale securities, less than 12 months, unrealized loss	0	(66,308)
Available-for-sale securities, fair value	710,623	724,668
Debt Securities, Gross Unrealized Loss	(86,674)	(66,308)
Corporate Debt Securities [Member]
Available-for-sale securities, less than 12 months, fair value	763,733	262,673
Available-for-sale securities, less than 12 months, unrealized loss	(9,373)	(863)
Available-for-sale securities, fair value	15,080,393	15,916,587
Debt Securities, Gross Unrealized Loss	(2,975,117)	(2,516,167)
Available-for-sale securities, greater than 12 months, fair value	14,316,660	15,653,914
Available-for-sale securities, greater than 12 months, unrealized loss	(2,965,744)	(2,515,304)
US States and Political Subdivisions Debt Securities [Member]
Available-for-sale securities, less than 12 months, fair value	789,733	523,744
Available-for-sale securities, less than 12 months, unrealized loss	(22,888)	(4,792)
Available-for-sale securities, fair value	4,846,956	5,349,312
Debt Securities, Gross Unrealized Loss	(632,476)	(575,547)
Available-for-sale securities, greater than 12 months, fair value	4,057,223	4,825,568
Available-for-sale securities, greater than 12 months, unrealized loss	(609,588)	(570,755)
Redeemable Preferred Stock [Member]
Available-for-sale securities, less than 12 months, fair value	0	0
Available-for-sale securities, less than 12 months, unrealized loss	0	0
Available-for-sale securities, fair value	2,989,680	3,305,569
Debt Securities, Gross Unrealized Loss	(177,163)	(318,702)
Available-for-sale securities, greater than 12 months, fair value	2,989,680	3,305,569
Available-for-sale securities, greater than 12 months, unrealized loss	(177,163)	(318,702)
Term Loans [Member]
Available-for-sale securities, less than 12 months, fair value	155,150	3,739,859
Available-for-sale securities, less than 12 months, unrealized loss	(2,076)	(174,955)
Available-for-sale securities, fair value	7,717,040	7,274,480
Debt Securities, Gross Unrealized Loss	(290,534)	(286,770)
Collateralized Mortgage-Backed Securities [Member]
Available-for-sale securities, less than 12 months, fair value	6,828,387	9,549,515
Available-for-sale securities, less than 12 months, unrealized loss	(243,281)	(219,946)
Available-for-sale securities, fair value	11,791,958	15,777,735
Debt Securities, Gross Unrealized Loss	(1,003,732)	(1,164,216)
Available-for-sale securities, greater than 12 months, fair value	4,963,571	6,228,220
Available-for-sale securities, greater than 12 months, unrealized loss	$ (760,451)	$ (944,270)

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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