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LOANS RECEIVABLE AND ALLOWANCE FOR LOAN LOSSES - Total Allowance by Loan Segment (Details) - USD ($) | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 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 |  |  | (519,000) | (954,000) | (1,151,000)
Recoveries |  |  | 220,000 |  | 247,000
Provision for loan losses | $ (139,000) | $ 246,000 | 65,000 | 601,000 | 856,000
Balance, end of year | 2,307,000 |  | 2,307,000 |  | 2,541,000
Individually evaluated for impairment: |  |  |  |  |
Individually evaluated for impairment, Balance in allowance | 210,000 |  | 210,000 |  | 226,000
Individually evaluated for impairment, Related loan balance | 4,796,000 |  | 4,796,000 |  | 2,250,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 2,097,000 |  | 2,097,000 |  | 2,315,000
Collectively evaluated for impairment, Related loan balance | 279,093,000 |  | 279,093,000 |  | 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 |  |  | 15,000 |  | 48,000
Provision for loan losses |  |  | 46,000 |  | 107,000
Balance, end of year | 153,000 |  | 153,000 |  | 161,000
Individually evaluated for impairment: |  |  |  |  |
Individually evaluated for impairment, Balance in allowance | 15,000 |  | 15,000 |  | 22,000
Individually evaluated for impairment, Related loan balance | 88,000 |  | 88,000 |  | 138,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 138,000 |  | 138,000 |  | 139,000
Collectively evaluated for impairment, Related loan balance | 12,281,000 |  | 12,281,000 |  | 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 |  |  | 1,000 |  | 2,000
Provision for loan losses |  |  | (210,000) |  | 390,000
Balance, end of year | 639,000 |  | 639,000 |  | 864,000
Individually evaluated for impairment: |  |  |  |  |
Individually evaluated for impairment, Related loan balance | 659,000 |  | 659,000 |  | 854,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 639,000 |  | 639,000 |  | 864,000
Collectively evaluated for impairment, Related loan balance | 79,552,000 |  | 79,552,000 |  | 81,783,000
Indirect |  |  |  |  |
Financing Receivable, Allowance for Credit Losses [Roll Forward] |  |  |  |  |
Balance, beginning of year |  |  | 988,000 | 774,000 | 774,000
Charged off |  |  | (407,000) |  | (341,000)
Recoveries |  |  | 194,000 |  | 183,000
Provision for loan losses |  |  | 164,000 |  | 372,000
Balance, end of year | 939,000 |  | 939,000 |  | 988,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 939,000 |  | 939,000 |  | 988,000
Collectively evaluated for impairment, Related loan balance | 106,088,000 |  | 106,088,000 |  | 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 |  |  | 2,000 |  | (10,000)
Balance, end of year | 226,000 |  | 226,000 |  | 241,000
Individually evaluated for impairment: |  |  |  |  |
Individually evaluated for impairment, Balance in allowance | 195,000 |  | 195,000 |  | 204,000
Individually evaluated for impairment, Related loan balance | 195,000 |  | 195,000 |  | 204,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 31,000 |  | 31,000 |  | 37,000
Collectively evaluated for impairment, Related loan balance | 11,155,000 |  | 11,155,000 |  | 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 |  |  | 3,000 |  | (8,000)
Balance, end of year | 7,000 |  | 7,000 |  | 4,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 7,000 |  | 7,000 |  | 4,000
Collectively evaluated for impairment, Related loan balance | 3,161,000 |  | 3,161,000 |  | 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 |  |  | 60,000 |  | 5,000
Balance, end of year | 343,000 |  | 343,000 |  | 283,000
Individually evaluated for impairment: |  |  |  |  |
Individually evaluated for impairment, Related loan balance | 3,854,000 |  | 3,854,000 |  | 1,054,000
Collectively evaluated for impairment: |  |  |  |  |
Collectively evaluated for impairment, Balance in allowance | 343,000 |  | 343,000 |  | 283,000
Collectively evaluated for impairment, Related loan balance | $ 66,856,000 |  | $ 66,856,000 |  | $ 69,059,000

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