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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Total Allowance by Loan Segment (Details) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			$ 2,541,000	$ 2,589,000	$ 2,589,000
Charged off			(435,000)	(769,000)	(1,151,000)
Recoveries			149,000		247,000
Provision for loan losses	$ 30,000	$ (5,000)	204,000	355,000	856,000
Balance, end of year	2,459,000		2,459,000		2,541,000
Individually evaluated for impairment:
Individually evaluated for impairment, Balance in allowance	216,000		216,000		226,000
Individually evaluated for impairment, Related loan balance	2,424,000		2,424,000		2,250,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	2,243,000		2,243,000		2,315,000
Collectively evaluated for impairment, Related loan balance	288,813,000		288,813,000		296,870,000
Consumer
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			161,000	214,000	214,000
Charged off			(69,000)		(208,000)
Recoveries			12,000		48,000
Provision for loan losses			49,000		107,000
Balance, end of year	153,000		153,000		161,000
Individually evaluated for impairment:
Individually evaluated for impairment, Balance in allowance	16,000		16,000		22,000
Individually evaluated for impairment, Related loan balance	154,000		154,000		138,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	137,000		137,000		139,000
Collectively evaluated for impairment, Related loan balance	12,105,000		12,105,000		12,933,000
Residential Real estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			864,000	1,061,000	1,061,000
Charged off			(16,000)		(589,000)
Recoveries					2,000
Provision for loan losses			(177,000)		390,000
Balance, end of year	671,000		671,000		864,000
Individually evaluated for impairment:
Individually evaluated for impairment, Related loan balance	784,000		784,000		854,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	671,000		671,000		864,000
Collectively evaluated for impairment, Related loan balance	80,429,000		80,429,000		81,783,000
Indirect
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			988,000	774,000	774,000
Charged off			(323,000)		(341,000)
Recoveries			127,000		183,000
Provision for loan losses			220,000		372,000
Balance, end of year	1,012,000		1,012,000		988,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	1,012,000		1,012,000		988,000
Collectively evaluated for impairment, Related loan balance	110,716,000		110,716,000		116,698,000
Commercial
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			241,000	237,000	237,000
Charged off			(27,000)
Recoveries			10,000		14,000
Provision for loan losses			16,000		(10,000)
Balance, end of year	240,000		240,000		241,000
Individually evaluated for impairment:
Individually evaluated for impairment, Balance in allowance	200,000		200,000		204,000
Individually evaluated for impairment, Related loan balance	284,000		284,000		204,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	40,000		40,000		37,000
Collectively evaluated for impairment, Related loan balance	11,781,000		11,781,000		14,080,000
Construction
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			4,000	12,000	12,000
Provision for loan losses			1,000		(8,000)
Balance, end of year	5,000		5,000		4,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	5,000		5,000		4,000
Collectively evaluated for impairment, Related loan balance	2,886,000		2,886,000		2,317,000
Commercial Real Estate
Financing Receivable, Allowance for Credit Losses [Roll Forward]
Balance, beginning of year			283,000	$ 291,000	291,000
Charged off					(13,000)
Provision for loan losses			95,000		5,000
Balance, end of year	378,000		378,000		283,000
Individually evaluated for impairment:
Individually evaluated for impairment, Related loan balance	1,202,000		1,202,000		1,054,000
Collectively evaluated for impairment:
Collectively evaluated for impairment, Balance in allowance	378,000		378,000		283,000
Collectively evaluated for impairment, Related loan balance	$ 70,896,000		$ 70,896,000		$ 69,059,000

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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