INVESTMENT SECURITIES - Fair Value to Amortized Cost (Details)	9 Months Ended
	Sep. 30, 2024 USD ($) security	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)
Securities Available-for-Sale
Amortized cost	$ 35,589,000		$ 79,701,000
Gross Unrealized Gains	162,000		21,000
Gross Unrealized Losses	(3,555,000)		(9,182,000)
Fair Value	32,196,000		70,540,000
Securities Held-to-Maturity
Amortized cost	13,450,000		13,461,000
Gross Unrealized Losses	(1,751,000)		(2,234,000)
Fair Value	11,699,000		11,227,000
Securities transferred between classifications	$ 0	$ 0
Debt securities available-for-sale | security	50
Loss on sales of investment securities	$ 5,507,000
Proceeds from the sales, inclusive of accrued interest	42,600,000
Accrued interest receivable on investment securities	153,000		241,000
Asset Pledged as Collateral | Deposits
Securities Held-to-Maturity
Securities pledged as collateral	14,400,000		44,600,000
Custodial letter of credit	19,000,000.0
Asset Pledged as Collateral | Federal Reserve Bank Advances
Securities Held-to-Maturity
Securities pledged as collateral	18,900,000		11,100,000
Mortgage-backed securities
Securities Available-for-Sale
Amortized cost	32,182,000		65,704,000
Gross Unrealized Gains	136,000		14,000
Gross Unrealized Losses	(3,402,000)		(8,206,000)
Fair Value	28,916,000		57,512,000
U.S. Government and agency obligations
Securities Available-for-Sale
Amortized cost	1,000,000		7,999,000
Gross Unrealized Losses	(5,000)		(611,000)
Fair Value	995,000		7,388,000
Securities Held-to-Maturity
Amortized cost	13,000,000		13,003,000
Gross Unrealized Losses	(1,733,000)		(2,210,000)
Fair Value	11,267,000		10,793,000
Municipal obligations
Securities Available-for-Sale
Amortized cost	2,407,000		5,998,000
Gross Unrealized Gains	26,000		7,000
Gross Unrealized Losses	(148,000)		(365,000)
Fair Value	2,285,000		5,640,000
Securities Held-to-Maturity
Amortized cost	450,000		458,000
Gross Unrealized Losses	(18,000)		(24,000)
Fair Value	$ 432,000		$ 434,000