INVESTMENT SECURITIES - Amortized cost and fair value of securities available-for-sale (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 35,750	$ 59,100
Gross Unrealized Gains	980	212
Gross Unrealized Losses	(64)	(409)
Fair Value	36,666	58,903
Amortization of Premium and discounts, net	400	200
U.S. Treasury debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	250	250
Gross Unrealized Gains	4	4
Fair Value	254	254
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,000
Gross Unrealized Gains	55
Gross Unrealized Losses	(11)
Fair Value	6,044
Association ("GNMA") mortgage-backed securities - residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	23,806	45,490
Gross Unrealized Gains	798	157
Gross Unrealized Losses		(335)
Fair Value	24,604	45,312
Federal National Mortgage Association ("FNMA") mortgage-backed securities - residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,616	2,935
Gross Unrealized Gains	61	11
Gross Unrealized Losses		(29)
Fair Value	1,677	2,917
Corporate collateralized mortgage obligations ("CMO") and mortgage-backed securities ("MBS")
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,078	10,425
Gross Unrealized Gains	62	40
Gross Unrealized Losses	(53)	(45)
Fair Value	4,087	10,420
Small Business Investment Company
Debt Securities, Available-for-sale [Line Items]
Payments to Acquire Investments	500	400
Contractual Obligation	900
Other Assets [Member] \| Small Business Investment Company
Debt Securities, Available-for-sale [Line Items]
Balance with SBIC included in other assets	$ 2,100	$ 1,600

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Sum of the carrying amounts as of the balance sheet date of all investments.

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