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INVESTMENT SECURITIES - Estimated Fair Value and Gross Unrealized Losses (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | $ 16,913 | $ 23,508
12 months or more, Estimated fair value | 5,981 | 4,008
Total, Estimated fair value | 22,894 | 27,516
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (99) | (133)
12 months or more, Unrealized loss | (64) | (61)
Total, Unrealized loss | (163) | (194)
U.S. Government Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 1,511 | 1,497
12 months or more, Estimated fair value |  | 1,514
Total, Estimated fair value | 1,511 | 3,011
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (4) | (1)
12 months or more, Unrealized loss |  | (6)
Total, Unrealized loss | (4) | (7)
Municipal securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 502 | 3,147
Total, Estimated fair value | 502 | 3,147
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss |  | (5)
Total, Unrealized loss |  | (5)
Mortgage-backed securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 2,164 | 7,772
12 months or more, Estimated fair value | 478 | 81
Total, Estimated fair value | 2,642 | 7,853
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (10) | (47)
12 months or more, Unrealized loss | (12) | (1)
Total, Unrealized loss | (22) | (48)
Collateralized mortgage obligation |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 1,742 | 4,155
12 months or more, Estimated fair value | 797 | 883
Total, Estimated fair value | 2,539 | 5,038
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (3) | (56)
12 months or more, Unrealized loss | (5) | (12)
Total, Unrealized loss | (8) | (68)
SBA securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 562 | 6,937
12 months or more, Estimated fair value | 3,705 | 1,530
Total, Estimated fair value | 4,267 | 8,467
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (1) | (24)
12 months or more, Unrealized loss | (45) | (42)
Total, Unrealized loss | (46) | $ (66)
Corporate Bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated fair value | 10,432 |
12 months or more, Estimated fair value | 1,001 |
Total, Estimated fair value | 11,433 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss [Abstract] |  |
Less than 12 months, Unrealized loss | (81) |
12 months or more, Unrealized loss | (2) |
Total, Unrealized loss | $ (83) |

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