INCOME TAXES - Summary of reconciliation between the income tax expense and the amount of income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Amount
Federal income tax at statutory rate	$ 2,817	$ 2,384
Tax-exempt income	(664)	(727)
Low-income housing credits	(405)	(405)
Bank owned life insurance income	(128)	(130)
Other	(43)	(8)
Income tax expense and rate	$ 1,577	$ 1,114
Rate
Federal income tax at statutory rate	21.00%	21.00%
Tax-exempt income	(4.90%)	(6.40%)
Low-income housing credits	(3.00%)	(3.60%)
Bank owned life insurance income	(1.00%)	(1.10%)
Other	(0.30%)	(0.10%)
Income tax expense and rate	11.80%	9.80%

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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-Name Accounting Standards Codification
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to life insurance expense.

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Amount of current and deferred federal income tax expense (benefit) attributable to income (loss) from continuing operations.

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The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to tax exempt income, equity in earnings (loss) of an unconsolidated subsidiary, minority noncontrolling interest income (loss), tax holiday, disposition of a business, disposition of an asset, repatriation of foreign earnings, repatriation of foreign earnings jobs creation act of 2004, increase (decrease) in enacted tax rate, prior year income taxes, increase (decrease) in deferred tax asset valuation allowance, and other adjustments.

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