FAIR VALUE - Summary of assets measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	$ 44,901	$ 53,650
U.S. treasury and federal agency
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	250	249
Securities issued by U.S. government sponsored entities and agencies
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	4,302	5,054
Small Business Investment Company
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	1,206	930
Equity mutual fund
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale		703
Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	44,901	53,650
Equity securities not available-for-sale	693
Recurring | U.S. treasury and federal agency
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	250	249
Recurring | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale		40,836
Recurring | Securities issued by U.S. government sponsored entities and agencies
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	4,302	5,054
Recurring | Corporate collateralized mortgage obligations and mortgage-backed securities
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	1,271	1,479
Recurring | Small Business Investment Company
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	1,206	930
Recurring | Interest rate lock and forward delivery commitments
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	890	665
Recurring | Equity mutual fund
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale		703
Recurring | GNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	34,002
Recurring | FNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	3,870	4,399
Level 1 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	250	952
Equity securities not available-for-sale	693
Level 1 | Recurring | U.S. treasury and federal agency
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	250	249
Level 1 | Recurring | Equity mutual fund
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale		703
Level 2 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	44,651	52,698
Level 2 | Recurring | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale		40,836
Level 2 | Recurring | Securities issued by U.S. government sponsored entities and agencies
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	4,302	5,054
Level 2 | Recurring | Corporate collateralized mortgage obligations and mortgage-backed securities
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	1,271	1,479
Level 2 | Recurring | Small Business Investment Company
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	1,206	930
Level 2 | Recurring | Interest rate lock and forward delivery commitments
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	890	665
Level 2 | Recurring | GNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	34,002
Level 2 | Recurring | FNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	$ 3,870	$ 4,399