ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Concentration of Credit Risk (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Debt securities pledged as collateral	$ 48,400	$ 22,600
Bank Technology Fund
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Debt securities pledged as collateral	47,300
March 27, 2024
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Borrowings from federal reserve bank	$ 30,997	$ 0
Collateral concentration risk | Loans Receivable | Secured by Real Estate
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Concentration risk (as a percent)	80.00%	77.90%