FAIR VALUE - Summary of assets measured at fair value on recurring basis (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	$ 58,727	$ 55,562
Mortgage loans held for sale, at fair value	33,663	30,620
U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	239	247
U.S. Government Agency
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	2,867	3,522
Corporate bonds
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	17,083	8,325
Government CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	658	878
Corporate CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	1,336	1,497
Recurring
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	58,727	55,562
Loans held at fair value	6,380
Equity securities	798	1,198
Guarantee asset	206	237
Equity warrants	402	160
Mortgage loans held for sale, at fair value	33,663	30,620
Recurring | U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	239	247
Recurring | U.S. Government Agency
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	2,867	3,522
Recurring | Corporate bonds
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	17,083	8,325
Recurring | Government CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	658	878
Recurring | Corporate CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	1,336	1,497
Recurring | IRLC,net
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	990	1,473
Recurring | Forward Commitment
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	1,478	(74)
Recurring | GNMA | mortgage-backed securities - residential
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	23,542	26,650
Recurring | FNMA | mortgage-backed securities - residential
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	13,002	14,443
Level 1 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	239	247
Equity securities	676	709
Level 1 | Recurring | U.S. Treasury debt
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	239	247
Level 2 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	52,273	53,202
Equity securities	122	489
Mortgage loans held for sale, at fair value	33,663	30,620
Level 2 | Recurring | U.S. Government Agency
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	2,867	3,522
Level 2 | Recurring | Corporate bonds
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	10,868	6,212
Level 2 | Recurring | Government CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	658	878
Level 2 | Recurring | Corporate CMO and MBS
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	1,336	1,497
Level 2 | Recurring | Forward Commitment
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	1,478	(65)
Level 2 | Recurring | GNMA | mortgage-backed securities - residential
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	23,542	26,650
Level 2 | Recurring | FNMA | mortgage-backed securities - residential
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	13,002	14,443
Level 3 | Recurring
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	6,215	2,113
Loans held at fair value	6,380
Guarantee asset	206	237
Equity warrants	402	160
Level 3 | Recurring | Corporate bonds
Summary of assets measured on a recurring and nonrecurring basis
Available-for-sale securities, at fair value	6,215	2,113
Level 3 | Recurring | IRLC,net
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value	$ 990	1,473
Level 3 | Recurring | Forward Commitment
Summary of assets measured on a recurring and nonrecurring basis
Derivative asset, Fair value		$ (9)