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Note 18 - Fair Value Measurements - Assets Measured at Fair Value on a Non-recurring Basis (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Mortgage Loan Servicing Rights | $ 3,967,000 | $ 2,304,000
Fair Value, Nonrecurring [Member] |  |
Impaired Loans | 7,851,000 | 5,922,000
Other Real Estate | 266,000 | 929,000
Mortgage Loan Servicing Rights | 3,967,000 | 2,131,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Impaired Loans | 0 | 0
Other Real Estate | 0 | 0
Mortgage Loan Servicing Rights | 0 | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Impaired Loans | 0 | 0
Other Real Estate | 0 | 0
Mortgage Loan Servicing Rights | 3,967,000 | 2,131,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Impaired Loans | 7,851,000 | 5,922,000
Other Real Estate | 266,000 | 929,000
Mortgage Loan Servicing Rights | $ 0 | $ 0

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- Definition Fair value of an asset representing net future revenue from contractually specified servicing fees, late charges, and other ancillary revenues, in excess of future costs related to servicing arrangements. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122492-111745 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 50 -Paragraph 3 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116651436&loc=d3e122625-111746 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + Details
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