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Note 3 - Securities - Securities With Unrealized Losses (Details) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | ---
US Treasury Securities [Member] |  |
Count, less than 12 months | 53 |
Collateralized mortgage obligations - residential, fair value | $ 62,246,000 |
Unrealized loss, less than 12 months | $ (76,000) |
Count, total | 53 |
Fair value, total | $ 62,246 |
Unrealized loss, total | $ (76,000) |
Collateralized Mortgage Backed Securities [Member] |  |
Count, less than 12 months |  | 0
Collateralized mortgage obligations - residential, fair value |  | $ 0
Unrealized loss, less than 12 months |  | $ 0
Count, total |  | 3
Fair value, total |  | $ 1,588,000
Unrealized loss, total |  | $ (1,000)
Count, 12 months or more |  | 3
Fair value, 12 months or more |  | $ 1,588,000
Unrealized loss, 12 months or more |  | $ (1,000)

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=124269663&loc=SL82922890-210455 + Details
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