LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Current, Past Due, and Non-Accrual Loans by Categories of loans and Restructured Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	$ 221,328	$ 247,041
Non-accrual	2,781	4,512	$ 4,964	$ 4,127
Total	224,674	253,772
Allowance for loan loss	2,790	1,476		2,066
Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	550	2,201
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	15	18
Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	141,365	142,489
Non-accrual	2,584	4,299
Total	144,062	148,555
Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	98	1,749
Real Estate Loan | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	15	18
Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	19,508	27,912
Non-accrual	71
Total	19,579	27,912
Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current		76,640
Non-accrual		213
Total	61,033	77,305
Consumer Loans | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due		452
Construction And Land Development [Member] | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	3,662	2,553
Total	3,662	2,553
Allowance for loan loss	43	9		24
Farmland | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	345	350
Total	345	350
Allowance for loan loss	11	2		2
Single-family | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	78,804	81,057
Non-accrual	132	270	615	790
Total	79,049	82,520
Allowance for loan loss	1,169	513		849
Single-family | Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	98	1,175
Single-family | Real Estate Loan | Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
90 Days or More and Still Accruing	15	18
Multi-family | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	5,846	6,105
Non-accrual			8	24
Total	5,846	6,105
Allowance for loan loss	105	39		40
Commercial | Real Estate Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	52,708	52,424
Non-accrual	2,452	4,029	4,081	3,139
Total	55,160	57,027
Allowance for loan loss	428	218		241
Commercial | Real Estate Loan | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due		574
Commercial | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	60,455
Non-accrual	126
Total	61,033
Commercial | Consumer Loans | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	452
Commercial and industrial | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	10,078	10,800
Total	10,078	10,800
Allowance for loan loss	166	67		69
SBA Guaranty | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	6,859	7,200
Non-accrual	71
Total	6,930	7,200
Allowance for loan loss	39	48		25
Comm SBA PPP | Commercial and Industrial
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,571	9,912
Total	2,571	9,912
Consumer and Indirect | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	2,398	3,029
Non-accrual		34	44	51
Total	2,398	3,063
Allowance for loan loss	72	11		11
Automobile | Consumer Loans
Financing Receivable, Recorded Investment, Past Due [Line Items]
Current	58,057	73,611
Non-accrual	126	179	$ 216	123
Total	58,635	74,242
Allowance for loan loss	757	569		$ 805
Automobile | Consumer Loans | Financing Receivables 30 To 89 Days Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
30-89 Days Past Due	$ 452	$ 452