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Note 3 - Securities (Tables) | 3 Months Ended
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Mar. 31, 2021
Notes Tables |
Schedule of Available-for-sale Securities Reconciliation [Table Text Block] |
|  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized Losses |  |  | Fair Value |
Available-for-Sale Securities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 12,389 |  |  | $ | — |  |  | $ | — |  |  | $ | 12,389 |
Municipal securities |  |  | 402 |  |  |  | 5 |  |  |  | — |  |  |  | 407 |
Mortgage-backed securities - residential |  |  | 5,652 |  |  |  | 274 |  |  |  | — |  |  |  | 5,926 |
Collateralized mortgage obligations - residential |  |  | 2,024 |  |  |  | 5 |  |  |  | — |  |  |  | 2,029 |
|  | $ | 20,467 |  |  | $ | 284 |  |  | $ | — |  |  | $ | 20,751 |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Certificates of deposit |  | $ | 15,117 |  |  | $ | — |  |  | $ | — |  |  | $ | 15,117 |
Municipal securities |  |  | 402 |  |  |  | 7 |  |  |  | — |  |  |  | 409 |
Mortgage-backed securities - residential |  |  | 5,826 |  |  |  | 282 |  |  |  | — |  |  |  | 6,108 |
Collateralized mortgage obligations - residential |  |  | 2,193 |  |  |  | 3 |  |  |  | (1 | ) |  |  | 2,195 |
|  | $ | 23,538 |  |  | $ | 292 |  |  | $ | (1 | ) |  | $ | 23,829 |
Investments Classified by Contractual Maturity Date [Table Text Block] |
|  | March 31, 2021 |
|  | Amortized Cost |  |  | Fair Value |
Due in one year or less |  | $ | 12,791 |  |  | $ | 12,796 |
Mortgage-backed securities - residential |  |  | 5,652 |  |  |  | 5,926 |
Collateralized mortgage obligations - residential |  |  | 2,024 |  |  |  | 2,029 |
|  | $ | 20,467 |  |  | $ | 20,751 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
|  |  |  |  |  | Less than 12 Months |  |  |  |  |  |  | 12 Months or More |  |  |  |  |  |  | Total |
|  | Count |  |  | Fair Value |  |  | Unrealized Loss |  |  | Count |  |  | Fair Value |  |  | Unrealized Loss |  |  | Count |  |  | Fair Value |  |  | Unrealized Loss |
December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Collateralized mortgage obligations - residential |  |  | — |  |  | $ | - |  |  | $ | - |  |  |  | 3 |  |  | $ | 1,588 |  |  | $ | (1 | ) |  |  | 3 |  |  | $ | 1,588 |  |  | $ | (1 | )

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- Definition For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 + Details
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