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Note 4 - Investment Securities (Tables) | 6 Months Ended
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Jun. 30, 2019
Notes Tables |
Schedule of Investment Securities Available-for-sale and Held-to-Maturity [Table Text Block] |
|  | Available-for-Sale |
|  | June 30 , 2019 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 64,271 |  |  | $ | 330 |  |  | $ | (334 | ) |  | $ | 64,267 |
Commercial |  |  | 49,306 |  |  |  | 46 |  |  |  | (603 | ) |  |  | 48,749 |
Obligations of states and political subdivisions |  |  | 4,754 |  |  |  | 111 |  |  |  | — |  |  |  | 4,865 |
U.S. Treasury securities |  |  | 79 |  |  |  | 1 |  |  |  | — |  |  |  | 80 |
Total |  | $ | 118,410 |  |  | $ | 488 |  |  | $ | (937 | ) |  | $ | 117,961 |
|  | Held-to-Maturity |
|  | June 30 , 2019 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 10,483 |  |  | $ | — |  |  | $ | (86 | ) |  | $ | 10,397 |
Obligations of U.S. government-sponsored agencies |  |  | 6,548 |  |  |  | — |  |  |  | (40 | ) |  |  | 6,508 |
Obligations of states and political subdivisions |  |  | 1,657 |  |  |  | 13 |  |  |  | (1 | ) |  |  | 1,669 |
Total |  | $ | 18,688 |  |  | $ | 13 |  |  | $ | (127 | ) |  | $ | 18,574 |
|  | Available-for-Sale |
|  | December 31, 2018 |
|  |  |  |  |  | Gross |  |  | Gross |  |  | Estimated |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 73,859 |  |  | $ | 113 |  |  | $ | (1,517 | ) |  | $ | 72,455 |
Commercial |  |  | 56,101 |  |  |  | 10 |  |  |  | (1,822 | ) |  |  | 54,289 |
Obligations of states and political subdivisions |  |  | 5,617 |  |  |  | 51 |  |  |  | (4 | ) |  |  | 5,664 |
U.S. Treasury securities |  |  | 79 |  |  |  | — |  |  |  | — |  |  |  | 79 |
Total |  | $ | 135,656 |  |  | $ | 174 |  |  | $ | (3,343 | ) |  | $ | 132,487 |
|  | Held-to-Maturity |
|  | December 31, 2018 |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 11,716 |  |  | $ | — |  |  | $ | (349 | ) |  | $ | 11,367 |
Obligations of U.S. government-sponsored agencies |  |  | 8,026 |  |  |  | — |  |  |  | (244 | ) |  |  | 7,782 |
Obligations of states and political subdivisions |  |  | 1,720 |  |  |  | — |  |  |  | (17 | ) |  |  | 1,703 |
Total |  | $ | 21,462 |  |  | $ | — |  |  | $ | (610 | ) |  | $ | 20,852 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | Available-for-Sale |  |  | Held-to-Maturity |
|  | Amortized Cost |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Estimated Fair Value |
|  | (Dollars in Thousands) |
Maturing within one year |  | $ | 259 |  |  | $ | 261 |  |  | $ | 122 |  |  | $ | 122 |
Maturing after one to five years |  |  | 34,821 |  |  |  | 34,766 |  |  |  | 3,397 |  |  |  | 3,400 |
Maturing after five to ten years |  |  | 47,803 |  |  |  | 47,686 |  |  |  | 6,176 |  |  |  | 6,113 |
Maturing after ten years |  |  | 35,527 |  |  |  | 35,248 |  |  |  | 8,993 |  |  |  | 8,939 |
Total |  | $ | 118,410 |  |  | $ | 117,961 |  |  | $ | 18,688 |  |  | $ | 18,574 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  | Available-for-Sale |
|  | June 30 , 2019 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 180 |  |  | $ | — |  |  | $ | 40,760 |  |  | $ | (334 | )
Commercial |  |  | 2 |  |  |  | — |  |  |  | 41,114 |  |  |  | (603 | )
U.S. Treasury securities |  |  | 80 |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 262 |  |  | $ | — |  |  | $ | 81,874 |  |  | $ | (937 | )
|  | Held-to-Maturity |
|  | June 30 , 2019 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | — |  |  | $ | — |  |  | $ | 10,397 |  |  | $ | (86 | )
Obligations of U.S. government-sponsored agencies |  |  | — |  |  |  | — |  |  |  | 6,386 |  |  |  | (40 | )
Obligations of states and political subdivisions |  |  | — |  |  |  | — |  |  |  | 508 |  |  |  | (1 | )
Total |  | $ | — |  |  | $ | — |  |  | $ | 17,291 |  |  | $ | (127 | )
|  | Available-for-Sale |
|  | December 31, 2018 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential |  | $ | 9,417 |  |  | $ | (87 | ) |  | $ | 53,507 |  |  | $ | (1,430 | )
Commercial |  |  | 461 |  |  |  | (3 | ) |  |  | 53,430 |  |  |  | (1,819 | )
Obligations of states and political subdivisions |  |  | 879 |  |  |  | (2 | ) |  |  | 420 |  |  |  | (2 | )
U.S. Treasury securities |  |  | 79 |  |  |  | — |  |  |  | — |  |  |  | — |
Total |  | $ | 10,836 |  |  | $ | (92 | ) |  | $ | 107,357 |  |  | $ | (3,251 | )
|  | Held-to-Maturity |
|  | December 31, 2018 |
|  | Less than 12 Months |  |  | 12 Months or More |
|  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
|  | (Dollars in Thousands) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | — |  |  | $ | — |  |  | $ | 11,367 |  |  | $ | (349 | )
Obligations of U.S. government-sponsored agencies |  |  | — |  |  |  | — |  |  |  | 7,782 |  |  |  | (244 | )
Obligations of states and political subdivisions |  |  | 770 |  |  |  | — |  |  |  | 933 |  |  |  | (17 | )
Total |  | $ | 770 |  |  | $ | — |  |  | $ | 20,082 |  |  | $ | (610 | )

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