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LOANS - Allowance for Loan Losses (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Sep. 30, 2020	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
LOANS
Allowance for Loan losses	$ 11,661,000	$ 11,026,000	$ 11,330,000	$ 11,385,000	$ 9,836,000
Allowance for Loan losses, Charge-offs	(47,000)		(146,000)	(58,000)	(194,000)
Allowance for Loan losses, Recoveries	17,000		18,000	45,000	32,000
Allowance for Loan losses, Provision (Credit)	744,000		(176,000)	1,003,000	1,352,000
Allowance for Loan losses	12,375,000		11,026,000	12,375,000	11,026,000
Commercial
LOANS
Allowance for Loan losses	6,564,000	5,858,000	6,089,000	6,308,000	4,788,000
Allowance for Loan losses, Charge-offs	0		(107,000)	0	(124,000)
Allowance for Loan losses, Recoveries	2,000		0	16,000	0
Allowance for Loan losses, Provision (Credit)	552,000		(124,000)	794,000	1,194,000
Allowance for Loan losses	7,118,000		5,858,000	7,118,000	5,858,000
Commercial | Real estate loan
LOANS
Allowance for Loan losses	3,350,000	2,426,000	1,932,000	3,051,000	1,921,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	2,000		0	2,000	0
Allowance for Loan losses, Provision (Credit)	100,000		494,000	399,000	505,000
Allowance for Loan losses	3,452,000		2,426,000	3,452,000	2,426,000
Commercial | Commercial and industrial
LOANS
Allowance for Loan losses	2,187,000	2,496,000	2,645,000	2,245,000	1,391,000
Allowance for Loan losses, Charge-offs	0		0	0	(17,000)
Allowance for Loan losses, Recoveries	0		0	14,000	0
Allowance for Loan losses, Provision (Credit)	594,000		(149,000)	522,000	1,122,000
Allowance for Loan losses	2,781,000		2,496,000	2,781,000	2,496,000
Commercial | Construction Loans
LOANS
Allowance for Loan losses			674,000	454,000
Allowance for Loan losses, Charge-offs			(107,000)
Allowance for Loan losses, Provision (Credit)		2,219,000
Allowance for Loan losses	452,000			452,000
Commercial | Commercial Construction And Land
LOANS
Allowance for Loan losses	476,000	420,000	970,000	454,000	966,000
Allowance for Loan losses, Charge-offs	0		(107,000)	0	(107,000)
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	(24,000)		(443,000)	(2,000)	(439,000)
Allowance for Loan losses	452,000		420,000	452,000	420,000
Commercial | Loans secured by farm land
LOANS
Allowance for Loan losses	111,000	146,000	144,000	120,000	158,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	2,000		2,000	(7,000)	(12,000)
Allowance for Loan losses	113,000		146,000	113,000	146,000
Commercial | Multi-family (5 or more) residential
LOANS
Allowance for Loan losses	255,000	163,000	199,000	236,000	156,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	(105,000)		(36,000)	(86,000)	7,000
Allowance for Loan losses	150,000		163,000	150,000	163,000
Commercial | Agricultural loans
LOANS
Allowance for Loan losses	26,000	40,000	39,000	34,000	41,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	(1,000)		1,000	(9,000)	(1,000)
Allowance for Loan losses	25,000		40,000	25,000	40,000
Commercial | Other commercial loans
LOANS
Allowance for Loan losses	159,000	167,000	160,000	168,000	155,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	(14,000)		7,000	(23,000)	12,000
Allowance for Loan losses	145,000		167,000	145,000	167,000
Residential mortgage
LOANS
Allowance for Loan losses	4,200,000	4,320,000	4,383,000	4,253,000	4,182,000
Allowance for Loan losses, Charge-offs	(11,000)		0	(11,000)	0
Allowance for Loan losses, Recoveries	2,000		2,000	4,000	5,000
Allowance for Loan losses, Provision (Credit)	164,000		(65,000)	109,000	133,000
Allowance for Loan losses	4,355,000		4,320,000	4,355,000	4,320,000
Residential mortgage | first liens
LOANS
Allowance for Loan losses		3,531,000		3,524,000	3,405,000
Allowance for Loan losses, Charge-offs				(11,000)	0
Allowance for Loan losses, Recoveries				2,000	2,000
Allowance for Loan losses, Provision (Credit)				21,000	124,000
Allowance for Loan losses	3,536,000		3,531,000	3,536,000	3,531,000
Residential mortgage | junior liens
LOANS
Allowance for Loan losses		365,000		349,000	384,000
Allowance for Loan losses, Charge-offs				0	0
Allowance for Loan losses, Recoveries				0	1,000
Allowance for Loan losses, Provision (Credit)				(22,000)	(20,000)
Allowance for Loan losses	327,000		365,000	327,000	365,000
Residential mortgage | Real estate loan | first liens
LOANS
Allowance for Loan losses	3,507,000	3,531,000	3,572,000	3,524,000
Allowance for Loan losses, Charge-offs	(11,000)		0
Allowance for Loan losses, Recoveries	1,000		1,000
Allowance for Loan losses, Provision (Credit)	39,000		(42,000)
Allowance for Loan losses	3,536,000		3,531,000	3,536,000	3,531,000
Residential mortgage | Real estate loan | junior liens
LOANS
Allowance for Loan losses	334,000	365,000	414,000	349,000
Allowance for Loan losses, Charge-offs	0		0
Allowance for Loan losses, Recoveries	0		0
Allowance for Loan losses, Provision (Credit)	(7,000)		(49,000)
Allowance for Loan losses	327,000		365,000	327,000	365,000
Residential mortgage | Construction Loans
LOANS
Allowance for Loan losses				99,000
Allowance for Loan losses	198,000			198,000
Residential mortgage | Home equity lines of credit
LOANS
Allowance for Loan losses	281,000	287,000	278,000	281,000	276,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	1,000		1,000	2,000	2,000
Allowance for Loan losses, Provision (Credit)	12,000		8,000	11,000	9,000
Allowance for Loan losses	294,000		287,000	294,000	287,000
Residential mortgage | 1-4 Family residential construction
LOANS
Allowance for Loan losses	78,000	137,000	119,000	99,000	117,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	120,000		18,000	99,000	20,000
Allowance for Loan losses	198,000		137,000	198,000	137,000
Consumer
LOANS
Allowance for Loan losses	220,000	263,000	273,000	239,000	281,000
Allowance for Loan losses, Charge-offs	(36,000)		(39,000)	(47,000)	(70,000)
Allowance for Loan losses, Recoveries	13,000		16,000	25,000	27,000
Allowance for Loan losses, Provision (Credit)	34,000		13,000	14,000	25,000
Allowance for Loan losses	231,000		263,000	231,000	263,000
Unallocated
LOANS
Allowance for Loan losses	677,000	$ 585,000	585,000	585,000	585,000
Allowance for Loan losses, Charge-offs	0		0	0	0
Allowance for Loan losses, Recoveries	0		0	0	0
Allowance for Loan losses, Provision (Credit)	(6,000)		0	86,000	0
Allowance for Loan losses	$ 671,000		$ 585,000	$ 671,000	$ 585,000

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Amount of (credit) provision related to estimated loss from loan transactions.

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