LOANS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES - Allowance for Credit Losses (Details)	6 Months Ended		12 Months Ended
	Jun. 30, 2024 USD ($) borrower	Jun. 30, 2023 USD ($) borrower	Dec. 31, 2023 USD ($)
Financing Receivable, Allowance for Credit Losses
Average loans	$ 181,282,000	$ 183,240,000
Net charge-offs to average loans (annualized)	0.25%	0.03%
Number of borrowers | borrower	7	5
Loans charged off	$ 327,000	$ 88,000	$ 203,000
Outstanding commitments	39,600,000	39,600,000
Term Loans by Origination Year
Year 3	12,000		47,000
Year 4	299,000		43,000
Year 5			27,000
Prior	16,000		86,000
Total	327,000	88,000	203,000
Unfunded commitments
Beginning balance	473,000	477,000	477,000
Reduction of unfunded reserve	(88,000)	(4,000)
Provisions charged to operations	186,000	23,000
Ending balance	$ 571,000	$ 496,000	473,000
Real Estate Loan | Single-family Residential
Financing Receivable, Allowance for Credit Losses
Number of borrowers | borrower	1
Commercial and Industrial | Commercial and Industrial
Financing Receivable, Allowance for Credit Losses
Loans charged off	$ 299,000
Term Loans by Origination Year
Year 4	299,000
Total	299,000
Consumer Loans | Consumer
Financing Receivable, Allowance for Credit Losses
Loans charged off	12,000		79,000
Term Loans by Origination Year
Year 3	12,000
Prior			79,000
Total	12,000		79,000
Consumer Loans | Automobile
Financing Receivable, Allowance for Credit Losses
Loans charged off	16,000		124,000
Term Loans by Origination Year
Year 3			47,000
Year 4			43,000
Year 5			27,000
Prior	16,000		7,000
Total	$ 16,000		$ 124,000