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LOANS - Summary of loans (Details) - USD ($)	Jun. 30, 2026	Mar. 31, 2026	Dec. 31, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024
LOANS
Loans, gross	$ 93,756,724		$ 91,321,812
Loans, allowance for credit losses	(1,118,851)	$ (1,168,867)	(1,138,600)	$ (1,098,861)	$ (1,111,608)	$ (1,208,149)
Net deferred loan fees	(417,797)		(421,716)
Loans, net	92,220,076		89,761,496
Commercial
LOANS
Loans, allowance for credit losses	(123,131)	(130,195)	(137,257)	(57,172)	(56,652)	(63,531)
Commercial \| Other construction and land/land development
LOANS
Loans, gross	1,129,192		1,087,189
Commercial \| Commercial real estate
LOANS
Loans, gross	7,041,679		7,147,826
Commercial \| Commercial and industrial
LOANS
Loans, gross	2,684,216		2,317,079
Commercial \| Municipal
LOANS
Loans, gross	43,576		46,214
Residential real estate
LOANS
Loans, allowance for credit losses	(990,139)	(1,033,149)	(995,084)	(1,038,359)	(1,046,443)	(1,138,183)
Residential real estate \| Residential construction
LOANS
Loans, gross	1,689,671		888,416
Residential real estate \| Revolving, open-end
LOANS
Loans, gross	4,427,561		3,464,812
Residential real estate \| First liens
LOANS
Loans, gross	74,508,106		73,906,730
Residential real estate \| Junior liens
LOANS
Loans, gross	1,250,912		1,263,727
Consumer
LOANS
Loans, gross	981,811		1,199,819
Loans, allowance for credit losses	$ (5,581)	$ (5,523)	$ (6,259)	$ (3,330)	$ (8,513)	$ (6,435)