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Note 2 - Securities Available for Sale - Schedule of Debt Securities in an Unrealized Loss Position (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Available for sale, fair value, less than 12 months	$ 4,141,353	$ 43,739,606
Available for sale, unrealized losses, less than 12 months	(64,393)	(120,511)
Available for sale, fair value, 12 months or more	39,783,037	55,231,941
Available for sale, unrealized losses, 12 months or more	(4,415,697)	(5,993,750)
Available for sale, fair value	43,924,390	98,971,547
Available for sale, unrealized losses	(4,480,090)	(6,114,261)
US Government Agencies Debt Securities [Member]
Available for sale, fair value, less than 12 months	0	0
Available for sale, unrealized losses, less than 12 months	0	0
Available for sale, fair value, 12 months or more	2,929,179	12,792,540
Available for sale, unrealized losses, 12 months or more	(70,821)	(207,460)
Available for sale, fair value	2,929,179	12,792,540
Available for sale, unrealized losses	(70,821)	(207,460)
Corporate Debt Securities [Member]
Available for sale, fair value, less than 12 months	3,433,035	0
Available for sale, unrealized losses, less than 12 months	(60,112)	0
Available for sale, fair value, 12 months or more	11,226,252	15,965,261
Available for sale, unrealized losses, 12 months or more	(1,002,413)	(1,453,923)
Available for sale, fair value	14,659,287	15,965,261
Available for sale, unrealized losses	(1,062,525)	(1,453,923)
US States and Political Subdivisions Debt Securities [Member]
Available for sale, fair value, less than 12 months	0	0
Available for sale, unrealized losses, less than 12 months	0	0
Available for sale, fair value, 12 months or more	424,280	398,275
Available for sale, unrealized losses, 12 months or more	(81,653)	(108,431)
Available for sale, fair value	424,280	398,275
Available for sale, unrealized losses	(81,653)	(108,431)
Residential Mortgage-Backed Securities [Member]
Available for sale, fair value, less than 12 months	708,318	43,739,606
Available for sale, unrealized losses, less than 12 months	(4,281)	(120,511)
Available for sale, fair value, 12 months or more	13,471,456	11,741,816
Available for sale, unrealized losses, 12 months or more	(1,607,056)	(2,042,162)
Available for sale, fair value	14,179,774	55,481,422
Available for sale, unrealized losses	(1,611,337)	(2,162,673)
Commercial Mortgage-Backed Securities [Member]
Available for sale, fair value, less than 12 months	0	0
Available for sale, unrealized losses, less than 12 months	0	0
Available for sale, fair value, 12 months or more	11,731,870	14,334,049
Available for sale, unrealized losses, 12 months or more	(1,653,754)	(2,181,774)
Available for sale, fair value	11,731,870	14,334,049
Available for sale, unrealized losses	$ (1,653,754)	$ (2,181,774)

X

- Definition

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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