FAIR VALUE - Fair value hierarchy of financial instruments (Details 2) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Financial assets - Carrying Amount
Cash and cash equivalents	$ 17,338	$ 10,622	$ 20,503	$ 12,371
Loans receivable, net	268,421	262,574
Cash value of life insurance	9,428
Financial liabilities - Carrying Amount
Deposits	335,481	333,237
Long-term debt	10,000	10,000
Short-term debt	15,000	10,000
Financial assets - Fair Value
Loans receivable, net	266,740	259,017
Financial liabilities - Fair Value
Deposits	317,448	315,418
Long-term debt	10,165	10,257
Short-term debt	15,065	$ 10,188
Fair Value
Financial assets - Fair Value
Cash and cash equivalents	17,338
Loans receivable, net	266,740
Cash value of life insurance	9,428
Financial liabilities - Fair Value
Deposits	317,448
Long-term debt	10,165
Short-term debt	15,065
Level 1 | Fair Value
Financial assets - Fair Value
Cash and cash equivalents	17,338
Loans receivable, net
Cash value of life insurance
Financial liabilities - Fair Value
Deposits	217,906
Long-term debt
Short-term debt
Level 2 | Fair Value
Financial assets - Fair Value
Cash and cash equivalents
Loans receivable, net
Cash value of life insurance	9,428
Financial liabilities - Fair Value
Deposits	99,542
Long-term debt	10,165
Short-term debt	15,065
Level 3 | Fair Value
Financial assets - Fair Value
Cash and cash equivalents
Loans receivable, net	266,740
Cash value of life insurance
Financial liabilities - Fair Value
Deposits
Long-term debt
Short-term debt