FAIR VALUE - Summary of assets measured at fair value on Non recurring basis (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned	$ 658	$ 658
Impaired loans	11,437	16,895
Other real estate owned, gross	2,400
Other real estate owned valuation allowance	1,700
Impaired loans carrying value	4,412	1,735
Allowance for loans	7,875	7,451
Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned		658
Level 3
Summary of assets measured on a recurring and nonrecurring basis
Impaired loans carrying value	4,400	1,700
Allowance for loans	800	900
Provision for loan losses	800	900
Bank charged off	200	0
Level 3 | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned		658
Commercial properties | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned	658
Commercial properties | Level 3 | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Other real estate owned	658
Commercial and Industrial | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Impaired loans	3,579	795
Commercial and Industrial | Level 3 | Nonrecurring
Summary of assets measured on a recurring and nonrecurring basis
Impaired loans	$ 3,579	$ 795