INVESTMENT SECURITIES HELD TO MATURITY - Additional information (Details) - USD ($)	1 Months Ended		3 Months Ended	9 Months Ended
	Sep. 30, 2025	Apr. 30, 2025	Sep. 30, 2025	Sep. 30, 2025	Dec. 31, 2024
INVESTMENT SECURITIES HELD TO MATURITY
Interest rate	3.49%		3.49%	3.49%	3.49%
Line of credit facility
INVESTMENT SECURITIES HELD TO MATURITY
Line of credit facility	$ 10,000,000	$ 5,000,000	$ 10,000,000	$ 10,000,000
Interest rate		1.00%
Outstanding borrowings	0		0	0
U.S. Treasury Strips
INVESTMENT SECURITIES HELD TO MATURITY
Interest income, accretion on securities			$ 126,450	$ 222,440
Purchase of debt securities	$ 9,943,694	$ 9,991,259
Debt securities, maturity period range	14 to 62 months	12 to 54 months
Debt securities, weighted average yield	3.70%	3.90%