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Note 2 - Investment Securities (Tables) | 9 Months Ended
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Sep. 30, 2020
Notes Tables |
Marketable Securities [Table Text Block] |
|  |  |  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  |  |  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
September 30, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 66,320 |  |  | $ | 1,472 |  |  | $ | 26 |  |  | $ | 67,766 |
Agency CMO |  |  | 27,927 |  |  |  | 279 |  |  |  | 53 |  |  |  | 28,153 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 64,804 |  |  |  | 1,300 |  |  |  | 2 |  |  |  | 66,102 |
Municipal obligations |  |  | 96,848 |  |  |  | 5,199 |  |  |  | 34 |  |  |  | 102,013 |
Total securities available for sale |  | $ | 255,899 |  |  | $ | 8,250 |  |  | $ | 115 |  |  | $ | 264,034 |
December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 69,984 |  |  | $ | 90 |  |  | $ | 576 |  |  | $ | 69,498 |
Agency CMO |  |  | 43,067 |  |  |  | 238 |  |  |  | 221 |  |  |  | 43,084 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 64,162 |  |  |  | 473 |  |  |  | 79 |  |  |  | 64,556 |
Municipal obligations |  |  | 74,606 |  |  |  | 2,843 |  |  |  | 25 |  |  |  | 77,424 |
Total securities available for sale |  | $ | 251,819 |  |  | $ | 3,644 |  |  | $ | 901 |  |  | $ | 254,562 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Securities Available for Sale |
|  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |
(In thousands) |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 20,481 |  |  | $ | 20,667 |
Due after one year through five years |  |  | 53,228 |  |  |  | 54,646 |
Due after five years through ten years |  |  | 32,411 |  |  |  | 34,536 |
Due after ten years |  |  | 55,532 |  |  |  | 58,266 |
|  |  | 161,652 |  |  |  | 168,115 |
Mortgage-backed securities and |  |  |  |  |  |  |  |
CMO |  |  | 94,247 |  |  |  | 95,919 |
|  | $ | 255,899 |  |  | $ | 264,034 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | Number of |  |  |  |  |  |  | Gross |
|  | Investment |  |  | Fair |  |  | Unrealized |
|  | Positions |  |  | Value |  |  | Losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 3 |  |  | $ | 6,122 |  |  | $ | 26 |
Agency CMO |  |  | 7 |  |  |  | 5,533 |  |  |  | 37 |
Agency notes and bonds |  |  | 1 |  |  |  | 4,998 |  |  |  | 2 |
Municipal obligations |  |  | 3 |  |  |  | 2,492 |  |  |  | 34 |
Total less than twelve months |  |  | 14 |  |  |  | 19,145 |  |  |  | 99 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency CMO |  |  | 3 |  |  |  | 1,385 |  |  |  | 16 |
Total more than twelve months |  |  | 3 |  |  |  | 1,385 |  |  |  | 16 |
Total securities available for sale |  |  | 17 |  |  | $ | 20,530 |  |  | $ | 115 |
|  | Number of |  |  |  |  |  |  | Gross |
|  | Investment |  |  | Fair |  |  | Unrealized |
|  | Positions |  |  | Value |  |  | Losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 5 |  |  | $ | 723 |  |  | $ | 2 |
Agency CMO |  |  | 13 |  |  |  | 14,749 |  |  |  | 157 |
Agency notes and bonds |  |  | 2 |  |  |  | 5,551 |  |  |  | 17 |
Municipal obligations |  |  | 4 |  |  |  | 3,241 |  |  |  | 25 |
Total less than twelve months |  |  | 24 |  |  |  | 24,264 |  |  |  | 201 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 50 |  |  |  | 49,033 |  |  |  | 574 |
Agency CMO |  |  | 15 |  |  |  | 7,113 |  |  |  | 64 |
Agency notes and bonds |  |  | 10 |  |  |  | 37,706 |  |  |  | 62 |
Total more than twelve months |  |  | 75 |  |  |  | 93,852 |  |  |  | 700 |
Total securities available for sale |  |  | 99 |  |  | $ | 118,116 |  |  | $ | 901 |

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