FAIR VALUE - Summary of Assets and Liabilities measured on a Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Assets measured at fair value on non-recurring basis
Other real estate owned	$ 175	$ 175
Non-recurring basis | Carrying Amount
Assets measured at fair value on non-recurring basis
Impaired loans	3,960	2,532
Other real estate owned	175	175
Non-recurring basis | Quoted Prices In Active Markets for Identical Assets (Level 1)
Assets measured at fair value on non-recurring basis
Impaired loans	0	0
Other real estate owned	0	0
Non-recurring basis | Significant Other Observable Inputs (Level 2)
Assets measured at fair value on non-recurring basis
Impaired loans	0	0
Other real estate owned	0	0
Non-recurring basis | Significant Unobservable Inputs (Level 3)
Assets measured at fair value on non-recurring basis
Impaired loans	3,960	2,532
Other real estate owned	$ 175	$ 175