INVESTMENT SECURITIES - Amortized cost and fair value of securities available-for-sale (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2020	Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 45,881	$ 59,100
Gross Unrealized Gains	1,249	212
Gross Unrealized Losses	(112)	(409)
Fair Value	47,018	58,903
U.S. Treasury debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	250	250
Gross Unrealized Gains	7	4
Fair Value	257	254
Association ("GNMA") mortgage-backed securities - residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	35,428	45,490
Gross Unrealized Gains	1,041	157
Gross Unrealized Losses		(335)
Fair Value	36,469	45,312
Federal National Mortgage Association ("FNMA") mortgage-backed securities - residential
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,646	2,935
Gross Unrealized Gains	90	11
Gross Unrealized Losses		(29)
Fair Value	2,736	2,917
Corporate collateralized mortgage obligations ("CMO") and mortgage-backed securities ("MBS")
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,557	10,425
Gross Unrealized Gains	111	40
Gross Unrealized Losses	(112)	(45)
Fair Value	7,556	10,420
Small Business Investment Company
Debt Securities, Available-for-sale [Line Items]
Payments to Acquire Investments	200	$ 400
Contractual Obligation	1,200
Other Assets [Member] \| Small Business Investment Company
Debt Securities, Available-for-sale [Line Items]
Balance with SBIC included in other assets	$ 1,800

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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The cash outflow associated with the purchase of all investments (debt, security, other) during the period.

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