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Note 5 - Fair Value Measurements - Assets Measured on a Nonrecurring Basis (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Impaired loans | $ 16,535 | $ 13,070
Fair Value, Nonrecurring [Member] |  |
Impaired loans | 4,126 | 5,166
Other real estate owned | 6,992 |
Fair Value, Inputs, Level 1 [Member] | Fair Value, Nonrecurring [Member] |  |
Impaired loans | 0 | 0
Other real estate owned | 0 |
Fair Value, Inputs, Level 2 [Member] | Fair Value, Nonrecurring [Member] |  |
Impaired loans | 0 | 0
Other real estate owned | 0 |
Fair Value, Inputs, Level 3 [Member] | Fair Value, Nonrecurring [Member] |  |
Impaired loans | 4,126 | $ 5,166
Other real estate owned | $ 6,992 |

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- Definition Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 14A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953550-111524 + Details
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