FAIR VALUE OF FINANCIAL INSTRUMENTS (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Financial assets:
Cash and cash equivalents	$ 20,305,000	$ 17,340,000	$ 29,133,000	$ 30,077,000
Certificates of deposits with other banks	14,778,000	14,527,000
Securities available-for-sale	231,507,000	162,368,000
Mortgage servicing rights	182,000	190,000
Securities held-to-maturity	0	0
Financial liabilities:
FHLB and other borrowings	152,169,000	90,921,000
FHLB and other borrowings
Financial liabilities:
Derivative liability	0	0
Carrying Value
Financial assets:
Cash and cash equivalents	20,305,000	17,340,000
Certificates of deposits with other banks	14,778,000	14,527,000
Securities available-for-sale	231,507,000	162,368,000
Loans held for sale	66,794,000	90,174,000
Loans, net	1,096,063,000	1,043,764,000
Mortgage servicing rights	182,000	190,000
Accrued interest receivable	5,296,000	3,951,000
Financial liabilities:
Deposits	1,159,580,000	1,107,017,000
Repurchase agreements	22,403,000	25,160,000
Accrued interest payable	643,000	741,000
Subordinated debt	33,524,000	33,524,000
Carrying Value | Interest rate lock commitment
Financial assets:
Derivative asset	1,426,000	1,546,000
Carrying Value | Interest rate swap
Financial assets:
Derivative asset	268,000	250,000
Financial liabilities:
Derivative liability	268,000	250,000
Carrying Value | Interest rate cap
Financial assets:
Derivative asset	33,000	268,000
Carrying Value | FHLB and other borrowings
Financial liabilities:
FHLB and other borrowings	152,169,000	90,921,000
Carrying Value | Mortgage-backed security hedges
Financial liabilities:
Derivative liability	78,000
Estimated Fair Value
Financial assets:
Cash and cash equivalents	20,305,000	17,340,000
Certificates of deposits with other banks	14,695,000	14,985,000
Securities available-for-sale	231,507,000	162,368,000
Loans held for sale	66,794,000	90,174,000
Loans, net	1,093,824,000	1,035,437,000
Mortgage servicing rights	182,000	190,000
Accrued interest receivable	5,296,000	3,951,000
Financial liabilities:
Deposits	1,126,615,000	1,116,174,000
Repurchase agreements	22,403,000	25,160,000
Accrued interest payable	643,000	741,000
Subordinated debt	35,117,000	32,275,000
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level I)
Financial assets:
Cash and cash equivalents	20,305,000	17,340,000
Securities available-for-sale	1,607,000	897,000
Estimated Fair Value | Significant Other Observable Inputs (Level II)
Financial assets:
Certificates of deposits with other banks	14,695,000	14,985,000
Securities available-for-sale	206,991,000	161,471,000
Loans held for sale	66,794,000	90,174,000
Accrued interest receivable	1,241,000	1,002,000
Financial liabilities:
Deposits	1,126,615,000	1,116,174,000
Repurchase agreements	22,403,000	25,160,000
Accrued interest payable	643,000	741,000
Subordinated debt	35,117,000	32,275,000
Estimated Fair Value | Significant Unobservable Inputs (Level III)
Financial assets:
Securities available-for-sale	22,909,000
Loans, net	1,093,824,000	1,035,437,000
Mortgage servicing rights	182,000	190,000
Accrued interest receivable	4,055,000	2,949,000
Estimated Fair Value | Interest rate lock commitment
Financial assets:
Derivative asset	1,426,000	1,546,000
Estimated Fair Value | Interest rate lock commitment | Significant Unobservable Inputs (Level III)
Financial assets:
Derivative asset	1,426,000	1,546,000
Estimated Fair Value | Interest rate swap
Financial assets:
Derivative asset	268,000	250,000
Financial liabilities:
Derivative liability	268,000	250,000
Estimated Fair Value | Interest rate swap | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset	268,000	250,000
Financial liabilities:
Derivative liability	268,000	250,000
Estimated Fair Value | Interest rate cap
Financial assets:
Derivative asset	33,000	268,000
Estimated Fair Value | Interest rate cap | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset	33,000	268,000
Estimated Fair Value | FHLB and other borrowings
Financial liabilities:
FHLB and other borrowings	152,190,000	90,919,000
Estimated Fair Value | FHLB and other borrowings | Significant Other Observable Inputs (Level II)
Financial liabilities:
FHLB and other borrowings	152,190,000	90,919,000
Estimated Fair Value | Mortgage-backed security hedges
Financial assets:
Derivative asset		372,000
Financial liabilities:
Derivative liability	78,000
Estimated Fair Value | Mortgage-backed security hedges | Significant Other Observable Inputs (Level II)
Financial assets:
Derivative asset		$ 372,000
Financial liabilities:
Derivative liability	$ 78,000