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SECURITIES - Available-for-sale Debt Securities by Contractual Maturity (Details) - USD ($)	Mar. 31, 2021	Dec. 31, 2020
Available-for-sale Securities
Due in one year or less, amortized cost	$ 14,667,000
Due in one year or less, fair value	14,760,000
Due from one year through five years. amortized cost	45,128,000
Due from one year through five years, fair value	46,421,000
Due from five years through ten years, amortized cost	51,245,000
Due from five years through ten years, fair value	52,787,000
Due after ten years, amortized cost	101,637,000
Due after ten years, fair value	103,765,000
Sub-total, amortized cost	212,677,000
Sub-total, fair value	217,733,000
Total, amortized cost	357,710,000	$ 334,552,000
Total, fair value	366,376,000	349,332,000
Investment Securities [Member]
Available-for-sale Securities
Investment pledged as collateral	254,860,000	247,373,000
Residential Passthrough Securities
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	38,790,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	39,757,000
Total, amortized cost	38,790,000	36,853,000
Total, fair value	39,757,000	38,176,000
Residential Collateralized Mortgage Obligations
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	52,715,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	53,971,000
Total, amortized cost	52,715,000	56,048,000
Total, fair value	53,971,000	$ 57,467,000
Commercial mortgage-backed securities
Available-for-sale Securities
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, amortized cost	53,528,000
Mortgage-backed securities issued or guaranteed by U.S. Government agencies or sponsored agencies, fair value	$ 54,915,000

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