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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Impaired financing receivables (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	$ 462,000	$ 294,000
Unpaid Principal Balance with specific reserves	462,000	294,000
Interest Income Recognized with specific reserves	1,000	15,000
Specific Reserve with specific reserves	255,000	226,000
Recorded Investment	512,000	347,000
Recorded Investment with no specific reserve	2,791,000	2,435,000
Unpaid Principal Balance with no specific reserve	3,869,000	3,569,000
Interest Income Recognized with no specific reserve	11,000	45,000
Specific Reserve	255,000
Average Recorded Investment with no specific reserve	3,556,000	3,179,000
Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	175,000	89,000
Unpaid Principal Balance with specific reserves	175,000	89,000
Interest Income Recognized with specific reserves	1,000	3,000
Specific Reserve with specific reserves	52,000	22,000
Recorded Investment	223,000	136,000
Recorded Investment with no specific reserve	137,000	96,000
Unpaid Principal Balance with no specific reserve	137,000	300,000
Interest Income Recognized with no specific reserve		2,000
Average Recorded Investment with no specific reserve	75,000	50,000
Indirect
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve	185,000	116,000
Unpaid Principal Balance with no specific reserve	185,000	457,000
Specific Reserve	255,000
Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment with specific reserves	287,000	204,000
Unpaid Principal Balance with specific reserves	287,000	204,000
Interest Income Recognized with specific reserves		12,000
Specific Reserve with specific reserves	203,000	204,000
Recorded Investment	289,000	211,000
Specific Reserve	203,000
Commercial Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve	1,234,000	1,267,000
Unpaid Principal Balance with no specific reserve	1,544,000	1,267,000
Interest Income Recognized with no specific reserve	10,000	39,000
Average Recorded Investment with no specific reserve	1,305,000	1,148,000
Residential Real estate
Financing Receivable, Impaired [Line Items]
Recorded Investment with no specific reserve	1,235,000	956,000
Unpaid Principal Balance with no specific reserve	2,004,000	1,545,000
Interest Income Recognized with no specific reserve	1,000	4,000
Average Recorded Investment with no specific reserve	$ 2,176,000	$ 1,981,000

X

- Definition

Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (g)
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Amount of interest income, recognized on cash basis, on financing receivables, for which there is no related allowance for credit losses and are recognized as impaired.

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