ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Adjusted Balance Sheet to Apply Adopted Guidance (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Jan. 01, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Assets
Allowance for credit losses: loans	$ (23,175)	$ (22,044)	$ (20,653)	$ (17,183)	$ (16,081)	$ (14,357)	$ (13,732)
Allowance for credit losses: held-to-maturity securities			(71)
Deferred tax assets, net			8,617
Liabilities
Allowance for credit losses on off-balance sheet exposures			3,900
Shareholders' Equity
Retained earnings	$ 54,261		46,568	$ 51,887
Balance at January 1, 2023 (before adjustment)
Assets
Allowance for credit losses: loans			(17,183)
Allowance for credit losses: held-to-maturity securities			0
Deferred tax assets, net			6,914
Liabilities
Allowance for credit losses on off-balance sheet exposures			419
Shareholders' Equity
Retained earnings			51,887
Cumulative effect adjustment amount
Assets
Allowance for credit losses: loans			(3,470)
Allowance for credit losses: held-to-maturity securities			(71)
Deferred tax assets, net			1,703
Liabilities
Allowance for credit losses on off-balance sheet exposures			3,481
Shareholders' Equity
Retained earnings			$ (5,319)