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INVESTMENT SECURITIES - Cost basis and fair values of investment securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	$ 161,416	$ 139,684
Investment securities available for sale, Gross Unrealized Gains	3,167	4,728
Investment securities available for sale, Gross Unrealized Losses	(1,412)	(247)
Available for Sale, Fair Value, Total	163,171	144,165
Investment securities held to maturity, Cost Basis	53,751	44,222
Investment securities held to maturity, Gross Unrealized Gains	2,001	2,937
Investment securities held to maturity, Gross Unrealized Losses	(236)	(53)
Held to Maturity, Fair Value, Total	55,516	47,106
U.S. Agency
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	7,371	2,971
Investment securities available for sale, Gross Unrealized Gains	86	181
Investment securities available for sale, Gross Unrealized Losses	(70)
Available for Sale, Fair Value, Total	7,387	3,152
Investment securities held to maturity, Cost Basis	2,500
Investment securities held to maturity, Gross Unrealized Losses	(11)
Held to Maturity, Fair Value, Total	2,489
U.S. Agency mortgage-backed securities
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	80,136	65,398
Investment securities available for sale, Gross Unrealized Gains	1,202	2,533
Investment securities available for sale, Gross Unrealized Losses	(1,171)	(18)
Available for Sale, Fair Value, Total	80,167	67,913
Investment securities held to maturity, Cost Basis	10,556	8,119
Investment securities held to maturity, Gross Unrealized Gains	203	369
Investment securities held to maturity, Gross Unrealized Losses	(115)
Held to Maturity, Fair Value, Total	10,644	8,488
Municipal
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	20,066	19,000
Investment securities available for sale, Gross Unrealized Gains	851	1,348
Investment securities available for sale, Gross Unrealized Losses	(25)
Available for Sale, Fair Value, Total	20,892	20,348
Investment securities held to maturity, Cost Basis	33,188	30,076
Investment securities held to maturity, Gross Unrealized Gains	1,734	2,455
Investment securities held to maturity, Gross Unrealized Losses	(103)	(49)
Held to Maturity, Fair Value, Total	34,819	32,482
Corporate bonds.
Information concerning investments with unrealized gains and losses
Investment securities available for sale, Cost Basis	53,843	52,315
Investment securities available for sale, Gross Unrealized Gains	1,028	666
Investment securities available for sale, Gross Unrealized Losses	(146)	(229)
Available for Sale, Fair Value, Total	54,725	52,752
Corporate bonds and other securities
Information concerning investments with unrealized gains and losses
Investment securities held to maturity, Cost Basis	7,507	6,027
Investment securities held to maturity, Gross Unrealized Gains	64	113
Investment securities held to maturity, Gross Unrealized Losses	(7)	(4)
Held to Maturity, Fair Value, Total	$ 7,564	$ 6,136

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