FAIR VALUE - Schedule of Financial Assets (Liabilities) Measured at Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 269,070	$ 380,795
Loans held for sale		5,542
Cash surrender value of life insurance	36,582	35,510
SBA servicing assets	808	763
Derivative instrument assets		629
Derivative instrument liabilities	(151)	(1,151)
Individually evaluated collateral dependent loans	4,418
Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	159,142	107,164
Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	64,623	66,945
Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	35,246	30,982
U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	10,059
Assets (liabilities) at fair value on a recurring basis: \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	159,142	107,164
Assets (liabilities) at fair value on a recurring basis: \| Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	64,623	66,945
Assets (liabilities) at fair value on a recurring basis: \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	10,059	30,982
Assets (liabilities) at fair value on a recurring basis: \| U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	1,903
Assets at fair value on a nonrecurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated collateral dependent loans	4,418	8,427
Municipal securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale		175,704
Municipal securities \| Assets (liabilities) at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	35,246	175,704
Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		0
Cash surrender value of life insurance	0	0
SBA servicing assets	0	0
Derivative instrument assets		0
Derivative instrument liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Assets (liabilities) at fair value on a recurring basis: \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Assets (liabilities) at fair value on a recurring basis: \| Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Assets (liabilities) at fair value on a recurring basis: \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Assets (liabilities) at fair value on a recurring basis: \| U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Assets at fair value on a nonrecurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated collateral dependent loans		0
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Municipal securities \| Assets (liabilities) at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		0
Cash surrender value of life insurance	36,582	35,510
SBA servicing assets	0	0
Derivative instrument assets		629
Derivative instrument liabilities	(151)	(1,151)
Significant Other Observable Inputs (Level 2) \| Assets (liabilities) at fair value on a recurring basis: \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	159,142	107,164
Significant Other Observable Inputs (Level 2) \| Assets (liabilities) at fair value on a recurring basis: \| Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	64,623	66,945
Significant Other Observable Inputs (Level 2) \| Assets (liabilities) at fair value on a recurring basis: \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	10,059	30,982
Significant Other Observable Inputs (Level 2) \| Assets (liabilities) at fair value on a recurring basis: \| U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	0
Significant Other Observable Inputs (Level 2) \| Assets at fair value on a nonrecurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated collateral dependent loans		0
Significant Other Observable Inputs (Level 2) \| Municipal securities \| Assets (liabilities) at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	35,246	175,704
Significant Other Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale		5,542
Cash surrender value of life insurance	0	0
SBA servicing assets	808	763
Derivative instrument assets		0
Derivative instrument liabilities	0	0
Individually evaluated collateral dependent loans	4,418
Significant Other Unobservable Inputs (Level 3) \| Assets (liabilities) at fair value on a recurring basis: \| Mortgage-backed securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Significant Other Unobservable Inputs (Level 3) \| Assets (liabilities) at fair value on a recurring basis: \| Collateralized mortgage obligations
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Significant Other Unobservable Inputs (Level 3) \| Assets (liabilities) at fair value on a recurring basis: \| Corporate bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	0	0
Significant Other Unobservable Inputs (Level 3) \| Assets (liabilities) at fair value on a recurring basis: \| U.S. government agencies
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for sale	1,903
Significant Other Unobservable Inputs (Level 3) \| Assets at fair value on a nonrecurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Individually evaluated collateral dependent loans	4,418	8,427
Significant Other Unobservable Inputs (Level 3) \| Municipal securities \| Assets (liabilities) at fair value on a recurring basis:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Securities available for sale	$ 0	$ 0

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements.

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