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INVESTMENT SECURITIES (Tables) | 12 Months Ended
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Dec. 31, 2020
INVESTMENT SECURITIES |
Schedule of amortized cost and estimated fair values of securities available-for-sale | The amortized cost, gross unrealized gains and losses, and estimated fair value of securities classified as available-for-sale at the dates indicated are summarized as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | Estimated
​ | ​ | cost | ​ | gains | ​ | losses | ​ | fair value
December 31, 2020 | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Treasuries | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
U.S. Government Agencies | ​ |  | 5,523 | ​ |  | 25 | ​ |  | (4) | ​ |  | 5,544
Municipal securities | ​ |  | 15,992 | ​ |  | 695 | ​ |  | — | ​ |  | 16,687
Mortgage-backed securities | ​ |  | 34,567 | ​ |  | 2,033 | ​ |  | (22) | ​ |  | 36,578
Collateralized mortgage obligations | ​ |  | 26,649 | ​ |  | 1,054 | ​ |  | (8) | ​ |  | 27,695
SBA securities | ​ |  | 7,661 | ​ |  | 52 | ​ |  | (46) | ​ |  | 7,667
Corporate bonds | ​ |  | 21,417 | ​ |  | 85 | ​ |  | (83) | ​ |  | 21,419
Total | ​ | $ | 111,809 | ​ | $ | 3,944 | ​ | $ | (163) | ​ | $ | 115,590
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ |  | Gross |  | Gross |  | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | Estimated
​ | ​ | cost | ​ | gains | ​ | losses | ​ | fair value
December 31, 2019 | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Treasuries | ​ | $ | 999 | ​ | $ | — | ​ | $ | — | ​ | $ | 999
U.S. Government Agencies | ​ |  | 10,033 | ​ |  | 64 | ​ |  | (7) | ​ |  | 10,090
Municipal securities | ​ |  | 17,888 | ​ |  | 408 | ​ |  | (5) | ​ |  | 18,291
Mortgage-backed securities | ​ |  | 42,931 | ​ |  | 860 | ​ |  | (48) | ​ |  | 43,743
Collateralized mortgage obligations | ​ |  | 28,197 | ​ |  | 476 | ​ |  | (68) | ​ |  | 28,605
SBA securities | ​ |  | 9,550 | ​ |  | 2 | ​ |  | (66) | ​ |  | 9,486
Corporate bonds | ​ |  | 8,534 | ​ |  | 141 | ​ |  | — | ​ |  | 8,675
Total | ​ | $ | 118,132 | ​ | $ | 1,951 | ​ | $ | (194) | ​ | $ | 119,889
​
Schedule of available-for-sale securities, continuous unrealized loss position, fair value | The estimated fair value and gross unrealized losses for securities available-for-sale aggregated by the length of time that individual securities have been in a continuous unrealized loss position at the dates indicated are as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized
​ | ​ | fair value | ​ | loss | ​ | fair value | ​ | loss | ​ | fair value | ​ | loss
December 31, 2020 | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Treasuries | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
U.S. Government Agencies | ​ |  | 1,511 | ​ |  | (4) | ​ |  | — | ​ |  | — | ​ |  | 1,511 | ​ |  | (4)
Municipal securities | ​ |  | 502 | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | 502 | ​ |  | —
Mortgage-backed securities | ​ |  | 2,164 | ​ |  | (10) | ​ |  | 478 | ​ |  | (12) | ​ |  | 2,642 | ​ |  | (22)
Collateralized mortgage obligations | ​ |  | 1,742 | ​ |  | (3) | ​ |  | 797 | ​ |  | (5) | ​ |  | 2,539 | ​ |  | (8)
SBA securities | ​ |  | 562 | ​ |  | (1) | ​ |  | 3,705 | ​ |  | (45) | ​ |  | 4,267 | ​ |  | (46)
Corporate bonds | ​ |  | 10,432 | ​ |  | (81) | ​ |  | 1,001 | ​ |  | (2) | ​ |  | 11,433 | ​ |  | (83)
Total | ​ | $ | 16,913 | ​ | $ | (99) | ​ | $ | 5,981 | ​ | $ | (64) | ​ | $ | 22,894 | ​ | $ | (163)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Less than 12 months | ​ | 12 months or more | ​ | Total
​ |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized |  | Estimated |  | Unrealized
​ | ​ | fair value | ​ | loss | ​ | fair value | ​ | loss | ​ | fair value | ​ | loss
December 31, 2019 | ​ | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
U.S. Treasuries | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
U.S. Government Agencies | ​ |  | 1,497 | ​ |  | (1) | ​ |  | 1,514 | ​ |  | (6) | ​ |  | 3,011 | ​ |  | (7)
Municipal securities | ​ |  | 3,147 | ​ |  | (5) | ​ |  | — | ​ |  | — | ​ |  | 3,147 | ​ |  | (5)
Mortgage-backed securities | ​ |  | 7,772 | ​ |  | (47) | ​ |  | 81 | ​ |  | (1) | ​ |  | 7,853 | ​ |  | (48)
Collateralized mortgage obligations | ​ |  | 4,155 | ​ |  | (56) | ​ |  | 883 | ​ |  | (12) | ​ |  | 5,038 | ​ |  | (68)
SBA securities | ​ |  | 6,937 | ​ |  | (24) | ​ |  | 1,530 | ​ |  | (42) | ​ |  | 8,467 | ​ |  | (66)
Corporate bonds | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | — | ​ |  | —
Total | ​ | $ | 23,508 | ​ | $ | (133) | ​ | $ | 4,008 | ​ | $ | (61) | ​ | $ | 27,516 | ​ | $ | (194)
​
Schedule of investments classified by contractual maturity date | The amortized cost and estimated fair value of securities available-for-sale at the dates indicated by contractual maturity are shown below. Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without call or prepayment penalties. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2020 | ​ | December 31, 2019
​ |  | Amortized |  | Estimated |  | Amortized |  | Estimated
​ | ​ | cost | ​ | fair value | ​ | cost | ​ | fair value
Available-for-sale |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
Due in one year or less | ​ | $ | 7,273 | ​ | $ | 7,342 | ​ | $ | 10,737 | ​ | $ | 10,781
Due after one through five years | ​ |  | 19,424 | ​ |  | 20,322 | ​ |  | 24,078 | ​ |  | 24,560
Due after five years through ten years | ​ |  | 34,165 | ​ |  | 34,898 | ​ |  | 22,914 | ​ |  | 23,366
Due after ten years | ​ |  | 50,947 | ​ |  | 53,028 | ​ |  | 60,403 | ​ |  | 61,182
Total | ​ | $ | 111,809 | ​ | $ | 115,590 | ​ | $ | 118,132 | ​ | $ | 119,889

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