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Note 3 - Debt Securities | 12 Months Ended
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Dec. 31, 2020
Notes to Financial Statements |
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block] | N ote 3. Debt Securities The following tables present the amortized cost and fair value of available-for-sale debt securities, including gross unrealized gains and losses, as of the dates indicated:
|  | December 31, 2020 |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | 555 |  |  | $ | — |  |  | $ | (4 | ) |  | $ | 551 |
Municipal securities |  |  | 43,950 |  |  |  | 509 |  |  |  | — |  |  |  | 44,459 |
Mortgage-backed Agency securities |  |  | 37,453 |  |  |  | 992 |  |  |  | (97 | ) |  |  | 38,348 |
Total |  | $ | 81,958 |  |  | $ | 1,501 |  |  | $ | (101 | ) |  | $ | 83,358 |
|  | December 31, 2019 |
|  | Amortized |  |  | Unrealized |  |  | Unrealized |  |  | Fair |
|  | Cost |  |  | Gains |  |  | Losses |  |  | Value |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | 5,038 |  |  | $ | — |  |  | $ | (4 | ) |  | $ | 5,034 |
Municipal securities |  |  | 85,992 |  |  |  | 886 |  |  |  | — |  |  |  | 86,878 |
Mortgage-backed Agency securities |  |  | 77,448 |  |  |  | 380 |  |  |  | (166 | ) |  |  | 77,662 |
Total |  | $ | 168,478 |  |  | $ | 1,266 |  |  | $ | (170 | ) |  | $ | 169,574 |
The following table presents the amortized cost and fair value of available-for-sale debt securities, by contractual maturity, as of December 31, 2020. Actual maturities could differ from contractual maturities because issuers may have the right to call or prepay obligations with or without penalties.
(Amounts in thousands) |  | U.S. Agency Securities |  |  | Municipal Securities |  |  | Total |
Amortized cost maturity: |  |  |  |  |  |  |  |  |  |  |  |
One year or less |  | $ | — |  |  | $ | — |  |  | $ | — |
After one year through five years |  |  | — |  |  |  | 24,485 |  |  |  | 24,485 |
After five years through ten years |  |  | 555 |  |  |  | 19,465 |  |  |  | 20,020 |
After ten years |  |  | — |  |  |  | — |  |  |  | — |
Amortized cost |  | $ | 555 |  |  | $ | 43,950 |  |  |  | 44,505 |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  | 37,453 |
Total amortized cost |  |  |  |  |  |  |  |  |  | $ | 81,958 |
Fair value maturity: |  |  |  |  |  |  |  |  |  |  |  |
One year or less |  | $ | — |  |  | $ | — |  |  | $ | — |
After one year through five years |  |  | — |  |  |  | 24,703 |  |  |  | 24,703 |
After five years through ten years |  |  | 551 |  |  |  | 19,756 |  |  |  | 20,307 |
After ten years |  |  | — |  |  |  | — |  |  |  | — |
Fair value |  | $ | 551 |  |  | $ | 44,459 |  |  |  | 45,010 |
Mortgage-backed securities |  |  |  |  |  |  |  |  |  |  | 38,348 |
Total fair value |  |  |  |  |  |  |  |  |  | $ | 83,358 |
The following tables present the fair values and unrealized losses for available-for-sale debt securities in a continuous unrealized loss position for less than 12 months and for 12 months or longer as of the dates indicated:
|  | December 31, 2020 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | — |  |  | $ | — |  |  | $ | 544 |  |  | $ | (4 | ) |  | $ | 544 |  |  | $ | (4 | )
Municipal securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Mortgage-backed Agency securities |  |  | 11,018 |  |  |  | (97 | ) |  |  | — |  |  |  | — |  |  |  | 11,018 |  |  |  | (97 | )
Total |  | $ | 11,018 |  |  | $ | (97 | ) |  | $ | 544 |  |  | $ | (4 | ) |  | $ | 11,562 |  |  | $ | (101 | )
|  | December 31, 2019 |
|  | Less than 12 Months |  |  | 12 Months or Longer |  |  | Total |
|  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |  |  | Fair |  |  | Unrealized |
|  | Value |  |  | Losses |  |  | Value |  |  | Losses |  |  | Value |  |  | Losses |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Agency securities |  | $ | 975 |  |  | $ | (4 | ) |  | $ | — |  |  | $ | — |  |  | $ | 975 |  |  | $ | (4 | )
Municipal securities |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Mortgage-backed Agency securities |  |  | 8,020 |  |  |  | (48 | ) |  |  | 8,319 |  |  |  | (118 | ) |  |  | 16,339 |  |  |  | (166 | )
Total |  | $ | 8,995 |  |  | $ | (52 | ) |  | $ | 8,319 |  |  | $ | (118 | ) |  | $ | 17,314 |  |  | $ | (170 | )
There were 6 individual debt securities in an unrealized loss position as of December 31, 2020, and their combined depreciation in value represented 0.12% of the debt securities portfolio. These securities included 1 security in a continuous unrealized loss position for 12 months or longer that the Company does not intend to sell, and that it has determined is not more likely than not going to be required to sell, prior to maturity or recovery. There were 17 individual debt securities in an unrealized loss position as of December 31, 2019, and their combined depreciation in value represented 0.10% of the debt securities portfolio. The Company reviews its investment portfolio quarterly for indications of OTTI. The initial indicator of OTTI for debt securities is a decline in fair value below book value and the severity and duration of the decline. The credit-related OTTI is recognized as a charge to noninterest income and the noncredit-related OTTI is recognized in OCI. Temporary impairment on debt securities is primarily related to changes in benchmark interest rates, changes in pricing in the credit markets, and other current economic factors. The following table presents gross realized gains and losses from the sale of available-for-sale debt securities for the periods indicated:
|  | Year Ended December 31, |
|  | 2020 |  |  | 2019 |  |  | 2018 |
(Amounts in thousands) |  |  |  |  |  |  |  |  |  |  |  |
Gross realized gains |  | $ | 419 |  |  | $ | 67 |  |  | $ | — |
Gross realized losses |  |  | (34 | ) |  |  | (110 | ) |  |  | (618 | )
Net gain (loss) on sale of securities |  | $ | 385 |  |  | $ | (43 | ) |  | $ | (618 | )
The carrying amount of securities pledged for various purposes totaled $36.56 million as of December 31, 2020, and $27.87 million as of December 31, 2019.

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