RECENT ACCOUNTING PRONOUNCEMENTS - Recent Accounting Pronouncements (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021	Jan. 01, 2021
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	$ 1,476,000	$ 2,161,000	$ 2,162,000		$ 2,470,000
Reserve for unfunded commitments	33,000	482,000	477,000	$ 354,000	371,000
Total allowance for credit losses	1,509,000
Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,574,000
Reserve for unfunded commitments	457,000
Total allowance for credit losses	2,031,000
Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	3,050,000
Reserve for unfunded commitments	490,000
Total allowance for credit losses	3,540,000
Real Estate Loan
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	781,000
Real Estate Loan | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,141,000
Real Estate Loan | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,922,000
Real Estate Loan | Construction and Land
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	9,000	40,000	44,000		5,000
Real Estate Loan | Construction and Land | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	17,000
Real Estate Loan | Construction and Land | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	26,000
Real Estate Loan | Farmland
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	2,000	19,000	20,000		11,000
Real Estate Loan | Farmland | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	9,000
Real Estate Loan | Farmland | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	11,000
Real Estate Loan | Single-family Residential
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	513,000	1,201,000	1,230,000		1,357,000
Real Estate Loan | Single-family Residential | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	853,000
Real Estate Loan | Single-family Residential | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	1,366,000
Real Estate Loan | Multi-family
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	39,000	100,000	103,000		105,000
Real Estate Loan | Multi-family | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	63,000
Real Estate Loan | Multi-family | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	102,000
Real Estate Loan | Commercial
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	218,000	216,000	221,000		278,000
Real Estate Loan | Commercial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	199,000
Real Estate Loan | Commercial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	417,000
Commercial and Industrial
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	115,000
Commercial and Industrial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	114,000
Commercial and Industrial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	229,000
Commercial and Industrial | Commercial and Industrial
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	67,000	284,000	174,000		115,000
Commercial and Industrial | Commercial and Industrial | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	120,000
Commercial and Industrial | Commercial and Industrial | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	187,000
Commercial and Industrial | SBA Guaranty
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	48,000	19,000	22,000		30,000
Commercial and Industrial | SBA Guaranty | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	(6,000)
Commercial and Industrial | SBA Guaranty | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	42,000
Consumer Loans
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	580,000
Consumer Loans | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	319,000
Consumer Loans | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	899,000
Consumer Loans | Consumer
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	11,000	22,000	23,000		36,000
Consumer Loans | Consumer | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	46,000
Consumer Loans | Consumer | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	57,000
Consumer Loans | Automobile
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	569,000	$ 260,000	$ 325,000		$ 533,000
Consumer Loans | Automobile | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	273,000
Consumer Loans | Automobile | Adjusted balance | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Allowance for loan losses	842,000
Retained Earnings | Adjustment | ASU 2016-13
RECENT ACCOUNTING PRONOUNCEMENTS
Total allowance for credit losses	2,031,000
Allowance for credit losses, tax effect	(559,000)
Allowance for credit losses net of tax	$ 1,472,000					$ 1,472,000