FAIR VALUE - Summary of assets measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	$ 58,903	$ 43,695
U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	254	250
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
Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	58,903	43,695
Equity securities not available-for-sale	713
Recurring | U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	254	250
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
Recurring | Corporate collateralized mortgage obligations and mortgage-backed securities
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	10,420	1,271
Recurring | Interest rate lock and forward delivery commitments
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	1,184	890
Recurring | Equity mutual fund
Summary of assets measured on a recurring and nonrecurring basis
Equity securities not available-for-sale		693
Recurring | GNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	45,312	34,002
Recurring | FNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	2,917	3,870
Level 1 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	254	250
Equity securities not available-for-sale	713
Level 1 | Recurring | U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	254	250
Level 1 | Recurring | Equity mutual fund
Summary of assets measured on a recurring and nonrecurring basis
Equity securities not available-for-sale		693
Level 2 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	58,649	43,445
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
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	10,420	1,271
Level 2 | Recurring | Interest rate lock and forward delivery commitments
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	1,184	890
Level 2 | Recurring | GNMA | mortgage-backed securities – residential
Summary of assets measured on a recurring and nonrecurring basis
Total securities available-for-sale	45,312	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	$ 2,917	$ 3,870