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Note 4 - Available-for-sale Securities (Tables) | 6 Months Ended
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Jun. 30, 2018
Notes Tables |
Debt Securities, Available-for-sale [Table Text Block] |
(In thousands) |  | Amortized Cost |  |  | Gross Unrealized Gains |  |  | Gross Unrealized (Losses) |  |  | Fair Value |
June 30, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 6,446 |  |  |  | - |  |  |  | (217 | ) |  |  | 6,229 |
Corporate bonds |  |  | 14,000 |  |  |  | - |  |  |  | (799 | ) |  |  | 13,201 |
Subordinated notes |  |  | 4,500 |  |  |  | 52 |  |  |  | - |  |  |  | 4,552 |
|  | $ | 24,946 |  |  |  | 52 |  |  |  | (1,016 | ) |  |  | 23,982 |
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 7,330 |  |  |  | - |  |  |  | (106 | ) |  |  | 7,224 |
Corporate bonds |  |  | 14,000 |  |  |  | - |  |  |  | (196 | ) |  |  | 13,804 |
Subordinated notes |  |  | 4,500 |  |  |  | 48 |  |  |  | - |  |  |  | 4,548 |
|  | $ | 25,830 |  |  |  | 48 |  |  |  | (302 | ) |  |  | 25,576 |
Schedule of Unrealized Loss on Investments [Table Text Block] |
(In thousands) |  | Less than 12 Months |  |  | 12 Months or More |  |  | Total |
|  | Fair Value |  |  | Unrealized (Loss) |  |  | Fair Value |  |  | Unrealized (Loss) |  |  | Fair Value |  |  | Unrealized (Loss) |
June 30, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 3,513 |  |  |  | (69 | ) |  |  | 2,716 |  |  |  | (148 | ) |  |  | 6,229 |  |  |  | (217 | )
Corporate bonds |  |  | 7,489 |  |  |  | (511 | ) |  |  | 5,712 |  |  |  | (288 | ) |  |  | 13,201 |  |  |  | (799 | )
|  | $ | 11,002 |  |  |  | (580 | ) |  |  | 8,428 |  |  |  | (436 | ) |  |  | 19,430 |  |  |  | (1,016 | )
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U. S. Government agency mortgage-backed securities |  | $ | 4,118 |  |  |  | (13 | ) |  |  | 3,106 |  |  |  | (93 | ) |  |  | 7,224 |  |  |  | (106 | )
Corporate bonds |  |  | 13,804 |  |  |  | (196 | ) |  |  | - |  |  |  | - |  |  |  | 13,804 |  |  |  | (196 | )
|  | $ | 17,922 |  |  |  | (209 | ) |  |  | 3,106 |  |  |  | (93 | ) |  |  | 21,028 |  |  |  | (302 | )
Investments Classified by Contractual Maturity Date [Table Text Block] |
(In thousands) |  | Amortized Cost |  |  | Fair Value |
|  | Due Within 5 years |  |  | Due After 5 years through 10 years |  |  | Due After 10 years |  |  | Total |  |  | Due Within 5 years |  |  | Due After 5 years through 10 years |  |  | Due After 10 years |  |  | Total |
June 30, 2018: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | - |  |  |  | 9,000 |  |  |  | 5,000 |  |  |  | 14,000 |  |  |  | - |  |  |  | 8,587 |  |  |  | 4,614 |  |  |  | 13,201 |
Subordinated notes |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,552 |  |  |  | - |  |  |  | 4,552 |
Available-for-sale securities with single maturity dates |  |  | - |  |  |  | 13,500 |  |  |  | 5,000 |  |  |  | 18,500 |  |  |  | - |  |  |  | 13,139 |  |  |  | 4,614 |  |  |  | 17,753 |
U. S. Government agency mortgage-backed securities |  |  | - |  |  |  | 2,864 |  |  |  | 3,582 |  |  |  | 6,446 |  |  |  | - |  |  |  | 2,716 |  |  |  | 3,513 |  |  |  | 6,229 |
|  | $ | - |  |  |  | 16,364 |  |  |  | 8,582 |  |  |  | 24,946 |  |  |  | - |  |  |  | 15,855 |  |  |  | 8,127 |  |  |  | 23,982 |
December 31, 2017: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Corporate bonds |  | $ | - |  |  |  | 9,000 |  |  |  | 5,000 |  |  |  | 14,000 |  |  |  | - |  |  |  | 8,928 |  |  |  | 4,876 |  |  |  | 13,804 |
Subordinated notes |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,500 |  |  |  | - |  |  |  | 4,548 |  |  |  | - |  |  |  | 4,548 |
Available-for-sale securities with single maturity dates |  |  | - |  |  |  | 13,500 |  |  |  | 5,000 |  |  |  | 18,500 |  |  |  | - |  |  |  | 13,476 |  |  |  | 4,876 |  |  |  | 18,352 |
U. S. Government agency mortgage-backed securities |  |  | - |  |  |  | 3,200 |  |  |  | 4,130 |  |  |  | 7,330 |  |  |  | - |  |  |  | 3,107 |  |  |  | 4,117 |  |  |  | 7,224 |
|  | $ | - |  |  |  | 16,700 |  |  |  | 9,130 |  |  |  | 25,830 |  |  |  | - |  |  |  | 16,583 |  |  |  | 8,993 |  |  |  | 25,576 |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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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=82897076&loc=d3e27290-111563 + Details
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