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Note 3 - Investment Securities (Tables) | 12 Months Ended
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Dec. 31, 2021
Notes Tables |
Marketable Securities [Table Text Block] |
|  |  |  |  |  | Gross |  |  | Gross |  |  |  |  |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
(In thousands) |  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
December 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 102,767 |  |  | $ | 604 |  |  | $ | 635 |  |  | $ | 102,736 |
Agency CMO |  |  | 7,863 |  |  |  | 98 |  |  |  | - |  |  |  | 7,961 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 130,641 |  |  |  | 489 |  |  |  | 2,034 |  |  |  | 129,096 |
Treasury notes and bonds |  |  | 50,339 |  |  |  | - |  |  |  | 545 |  |  |  | 49,794 |
Municipal obligations |  |  | 153,610 |  |  |  | 4,721 |  |  |  | 583 |  |  |  | 157,748 |
Total securities available for sale |  | $ | 445,220 |  |  | $ | 5,912 |  |  | $ | 3,797 |  |  | $ | 447,335 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate notes |  | $ | 2,000 |  |  | $ | 4 |  |  | $ | - |  |  | $ | 2,004 |
Total securities available for sale |  | $ | 2,000 |  |  | $ | 4 |  |  | $ | - |  |  | $ | 2,004 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  | $ | 59,997 |  |  | $ | 1,362 |  |  | $ | - |  |  | $ | 61,359 |
Agency CMO |  |  | 20,842 |  |  |  | 218 |  |  |  | 30 |  |  |  | 21,030 |
Other debt securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Agency notes and bonds |  |  | 80,359 |  |  |  | 1,175 |  |  |  | 3 |  |  |  | 81,531 |
Municipal obligations |  |  | 113,511 |  |  |  | 6,075 |  |  |  | 4 |  |  |  | 119,582 |
Total securities available for sale |  | $ | 274,709 |  |  | $ | 8,830 |  |  | $ | 37 |  |  | $ | 283,502 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Securities Available for Sale |  |  | Securities Held to Maturity |
|  | Amortized |  |  | Fair |  |  | Amortized |  |  | Fair |
|  | Cost |  |  | Value |  |  | Cost |  |  | Value |
(In thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Due in one year or less |  | $ | 2,043 |  |  | $ | 2,049 |  |  | $ | - |  |  | $ | - |
Due after one year through five years |  |  | 182,653 |  |  |  | 181,145 |  |  |  | - |  |  |  | - |
Due after five years through ten years |  |  | 56,104 |  |  |  | 57,063 |  |  |  | - |  |  |  | - |
Due after ten years |  |  | 93,790 |  |  |  | 96,381 |  |  |  | 2,000 |  |  |  | 2,004 |
|  |  | 334,590 |  |  |  | 336,638 |  |  |  | 2,000 |  |  |  | 2,004 |
Mortgage-backed securities and |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
CMO |  |  | 110,630 |  |  |  | 110,697 |  |  |  | - |  |  |  | - |
|  | $ | 445,220 |  |  | $ | 447,335 |  |  | $ | 2,000 |  |  | $ | 2,004 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | Number of |  |  |  |  |  |  | Gross |
|  | Investment |  |  | Fair |  |  | Unrealized |
|  | Positions |  |  | Value |  |  | Losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2021: |  |  |  |  |  |  |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 23 |  |  | $ | 67,512 |  |  | $ | 607 |
Agency notes and bonds |  |  | 39 |  |  |  | 98,042 |  |  |  | 1,710 |
Treasury notes and bonds |  |  | 11 |  |  |  | 49,190 |  |  |  | 545 |
Muncipal obligations |  |  | 49 |  |  |  | 32,642 |  |  |  | 479 |
Total less than twelve months |  |  | 122 |  |  |  | 247,386 |  |  |  | 3,341 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency mortgage-backed securities |  |  | 1 |  |  |  | 1,357 |  |  |  | 28 |
Agency notes and bonds |  |  | 4 |  |  |  | 13,676 |  |  |  | 324 |
Muncipal obligations |  |  | 4 |  |  |  | 2,957 |  |  |  | 104 |
Total more than twelve months |  |  | 9 |  |  |  | 17,990 |  |  |  | 456 |
Total securities available for sale |  |  | 131 |  |  | $ | 265,376 |  |  | $ | 3,797 |
|  | Number of |  |  |  |  |  |  | Gross |
|  | Investment |  |  | Fair |  |  | Unrealized |
|  | Positions |  |  | Value |  |  | Losses |
(Dollars in thousands) |  |  |  |  |  |  |  |  |  |  |  |
December 31, 2020: |  |  |  |  |  |  |  |  |  |  |  |
Continuous loss position less than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency CMO |  |  | 12 |  |  | $ | 6,189 |  |  | $ | 18 |
Agency notes and bonds |  |  | 2 |  |  |  | 5,997 |  |  |  | 3 |
Municipal obligations |  |  | 2 |  |  |  | 1,303 |  |  |  | 4 |
Total less than twelve months |  |  | 16 |  |  |  | 13,489 |  |  |  | 25 |
Continuous loss position more than twelve months: |  |  |  |  |  |  |  |  |  |  |  |
Agency CMO |  |  | 4 |  |  |  | 1,589 |  |  |  | 12 |
Total more than twelve months |  |  | 4 |  |  |  | 1,589 |  |  |  | 12 |
Total securities available for sale |  |  | 20 |  |  | $ | 15,078 |  |  | $ | 37 |

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