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Securities (Tables) | 12 Months Ended
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Dec. 31, 2021
Investments, Debt and Equity Securities [Abstract] |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] | A summary of amortized cost and cost and fair value of securities is presented below.
|  | December 31, 2021 |
(In thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agencies |  | $ | 15,847 |  |  | $ | 4 |  |  | $ | 449 |  |  | $ | 15,402 |
Mortgage-backed securities |  |  | 1,724 |  |  |  | 30 |  |  |  | - |  |  |  | 1,754 |
Total securities available for sale |  | $ | 17,571 |  |  | $ | 34 |  |  | $ | 449 |  |  | $ | 17,156 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property assessed clean energy |  | $ | 2,731 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,731 |
Public Improvement District & TIRZ |  |  | 16,942 |  |  |  | - |  |  |  | - |  |  |  | 16,942 |
Total securities held to maturity |  | $ | 19,673 |  |  | $ | - |  |  | $ | - |  |  | $ | 19,673 |
Securities, restricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | $ | 2,432 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,432 |
Securities not readily marketable |  | $ | 100 |  |  | $ | - |  |  | $ | - |  |  | $ | 100 |
|  | December 31, 2020 |
(In thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Estimated Fair Value |
Securities available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. government agencies |  | $ | 14,936 |  |  | $ | 38 |  |  | $ | 25 |  |  | $ | 14,949 |
Mortgage-backed securities |  |  | 2,373 |  |  |  | 74 |  |  |  | - |  |  |  | 2,447 |
Total securities available for sale |  | $ | 17,309 |  |  | $ | 112 |  |  | $ | 25 |  |  | $ | 17,396 |
Securities held to maturity: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Property assessed clean energy |  | $ | 5,776 |  |  | $ | - |  |  | $ | - |  |  | $ | 5,776 |
Securities, restricted: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other |  | $ | 2,431 |  |  | $ | - |  |  | $ | - |  |  | $ | 2,431 |
Securities not readily marketable |  | $ | 100 |  |  | $ | - |  |  | $ | - |  |  | $ | 100 |
Debt Securities, Available-for-sale, Unrealized Loss Position, Fair Value [Table Text Block] | The table below indicates the length of time individual investment securities have been in a continuous loss position as of December 31, 2021:
|  | Less than 12 months |  |  | 12 months or longer |  |  | Total |
(In thousands) |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |  |  | Fair Value |  |  | Unrealized Losses |
U.S. government agencies |  | $ | 9,438 |  |  | $ | 256 |  |  | $ | 5,803 |  |  | $ | 193 |  |  | $ | 15,241 |  |  | $ | 449 |
Investments Classified by Contractual Maturity Date [Table Text Block] | The amortized cost and estimated fair value of securities at December 31, 2021 are presented below by contractual maturity. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Residential mortgage backed securities are shown separately since they are not due at a single maturity date.
|  | Available for Sale |  |  | Held to Maturity |
(In thousands) |  | Amortized Cost |  |  | Estimated Fair Value |  |  | Amortized Cost |  |  | Estimated Fair Value |
Due in one year or less |  | $ | 21 |  |  | $ | 21 |  |  | $ | - |  |  | $ | - |
Due after one year through five years |  |  | 1,995 |  |  |  | 1,927 |  |  |  | 2,707 |  |  |  | 2,707 |
Due after five years through ten years |  |  | 10,157 |  |  |  | 9,916 |  |  |  | - |  |  |  | - |
Due after ten years |  |  | 3,674 |  |  |  | 3,538 |  |  |  | 16,966 |  |  |  | 16,966 |
Mortgage-backed securities |  |  | 1,724 |  |  |  | 1,754 |  |  |  | - |  |  |  | - |
Total |  | $ | 17,571 |  |  | $ | 17,156 |  |  | $ | 19,673 |  |  | $ | 19,673 |

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