FAIR VALUE - Summary of carrying amounts and estimated fair values of financial instruments not Measured at Fair Value (Detail) - USD ($)	Mar. 31, 2022	Dec. 31, 2021
Financial instruments - assets
Cash and due from banks	$ 69,504,000	$ 105,069,000
Investment securities held-to-maturity	78,414,506	74,081,059
Loans	547,123,000	569,845,000
Financial instruments - liabilities
Certificates of deposit	340,655,000	365,452,000
Borrowings	78,000,000	86,657,000
Fair Value Measurement Placement (Level 1)
Financial instruments - assets
Cash and due from banks	69,504,000	105,069,000
Fair Value Measurement Placement (Level 2)
Financial instruments - assets
Investment securities held-to-maturity	78,415,000	74,081,000
Financial instruments - liabilities
Certificates of deposit	340,655,000	365,452,000
Borrowings	78,000,000	86,657,000
Fair Value Measurement Placement (Level 3)
Financial instruments - assets
Loans	547,123,000	569,845,000
Carrying Value
Financial instruments - assets
Cash and due from banks	69,504,000	105,069,000
Investment securities held-to-maturity	81,315,000	74,053,000
Loans	564,877,000	571,363,000
Financial instruments - liabilities
Certificates of deposit	339,933,000	366,396,000
Borrowings	$ 78,004,000	$ 85,052,000