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INVESTMENT SECURITIES - Total investment securities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	$ 3,724
Available for Sale, Cost Basis, After 1 year but within 5 years	35,781
Available for Sale, Cost Basis, After 5 years but within 10 years	47,964
Available for Sale, Cost Basis, Over 10 years	73,947
Available for Sale, Cost Basis, Total	161,416	$ 139,684
Available for Sale, Fair Value, Within 1 year	3,745
Available for Sale, Fair Value, After 1 year but within 5 years	36,577
Available for Sale, Fair Value, After 5 years but within 10 years	49,135
Available for Sale, Fair Value, Over 10 years	73,714
Available for Sale, Fair Value, Total	163,171	144,165
Held to Maturity, Cost Basis, Within 1 year	200
Held to Maturity, Cost Basis, After 1 year but within 5 years	12,188
Held to Maturity, Cost Basis, After 5 years but within 10 years	24,744
Held to Maturity, Cost Basis, Over 10 years	16,619
Held to Maturity, Cost Basis, Total	53,751	44,222
Held to Maturity, Fair Value, Within 1 year	205
Held to Maturity, Fair Value, After 1 year but within 5 years	12,573
Held to Maturity, Fair Value, After 5 years but within 10 years	26,014
Held to Maturity, Fair Value, Over 10 years	16,724
Held to Maturity, Fair Value, Total	55,516	47,106
U.S. Agency
Contractual maturities of securities
Available for Sale, Cost Basis, After 5 years but within 10 years	5,497
Available for Sale, Cost Basis, Over 10 years	1,874
Available for Sale, Cost Basis, Total	7,371	2,971
Available for Sale, Fair Value, After 5 years but within 10 years	5,438
Available for Sale, Fair Value, Over 10 years	1,949
Available for Sale, Fair Value, Total	7,387	3,152
Held to Maturity, Cost Basis, After 5 years but within 10 years	2,500
Held to Maturity, Cost Basis, Total	2,500
Held to Maturity, Fair Value, After 5 years but within 10 years	2,489
Held to Maturity, Fair Value, Total	2,489
Municipal
Contractual maturities of securities
Available for Sale, Cost Basis, Total	20,066	19,000
Available for Sale, Fair Value, Total	20,892	20,348
Held to Maturity, Cost Basis, Within 1 year	200
Held to Maturity, Cost Basis, After 1 year but within 5 years	5,130
Held to Maturity, Cost Basis, After 5 years but within 10 years	21,287
Held to Maturity, Cost Basis, Over 10 years	6,571
Held to Maturity, Cost Basis, Total	33,188	30,076
Held to Maturity, Fair Value, Within 1 year	205
Held to Maturity, Fair Value, After 1 year but within 5 years	5,431
Held to Maturity, Fair Value, After 5 years but within 10 years	22,540
Held to Maturity, Fair Value, Over 10 years	6,643
Held to Maturity, Fair Value, Total	34,819	32,482
Corporate Bonds and Other
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	3,002
Available for Sale, Cost Basis, After 1 year but within 5 years	22,648
Available for Sale, Cost Basis, After 5 years but within 10 years	27,543
Available for Sale, Cost Basis, Over 10 years	650
Available for Sale, Cost Basis, Total	53,843
Available for Sale, Fair Value, Within 1 year	3,014
Available for Sale, Fair Value, After 1 year but within 5 years	22,797
Available for Sale, Fair Value, After 5 years but within 10 years	28,250
Available for Sale, Fair Value, Over 10 years	664
Available for Sale, Fair Value, Total	54,725
Held to Maturity, Cost Basis, After 1 year but within 5 years	6,021
Held to Maturity, Cost Basis, After 5 years but within 10 years	500
Held to Maturity, Cost Basis, Over 10 years	986
Held to Maturity, Cost Basis, Total	7,507
Held to Maturity, Fair Value, After 1 year but within 5 years	6,078
Held to Maturity, Fair Value, After 5 years but within 10 years	500
Held to Maturity, Fair Value, Over 10 years	986
Held to Maturity, Fair Value, Total	7,564
U.S. Agency mortgage-backed securities
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	22
Available for Sale, Cost Basis, After 1 year but within 5 years	2,034
Available for Sale, Cost Basis, After 5 years but within 10 years	6,657
Available for Sale, Cost Basis, Over 10 years	71,423
Available for Sale, Cost Basis, Total	80,136	65,398
Available for Sale, Fair Value, Within 1 year	23
Available for Sale, Fair Value, After 1 year but within 5 years	2,133
Available for Sale, Fair Value, After 5 years but within 10 years	6,910
Available for Sale, Fair Value, Over 10 years	71,101
Available for Sale, Fair Value, Total	80,167	67,913
Held to Maturity, Cost Basis, After 1 year but within 5 years	1,037
Held to Maturity, Cost Basis, After 5 years but within 10 years	457
Held to Maturity, Cost Basis, Over 10 years	9,062
Held to Maturity, Cost Basis, Total	10,556	8,119
Held to Maturity, Fair Value, After 1 year but within 5 years	1,064
Held to Maturity, Fair Value, After 5 years but within 10 years	485
Held to Maturity, Fair Value, Over 10 years	9,095
Held to Maturity, Fair Value, Total	10,644	$ 8,488
Municipal
Contractual maturities of securities
Available for Sale, Cost Basis, Within 1 year	700
Available for Sale, Cost Basis, After 1 year but within 5 years	11,099
Available for Sale, Cost Basis, After 5 years but within 10 years	8,267
Available for Sale, Cost Basis, Total	20,066
Available for Sale, Fair Value, Within 1 year	708
Available for Sale, Fair Value, After 1 year but within 5 years	11,647
Available for Sale, Fair Value, After 5 years but within 10 years	8,537
Available for Sale, Fair Value, Total	$ 20,892

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