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Note 19 - Fair Value of Financial Instruments and Fair Value Measurements - Financial Instruments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value | $ 347,332 | $ 353,066
Reported Value Measurement [Member] |  |
Cash and short-term investments | 104,092 | 60,156
Fair Value | 347,332 | 353,066
Federal Home Loan Bank stock | 4,288 | 2,978
Loans held for sale | 10,076 |
Loans, net | 961,696 | 774,249
Deposits | 1,293,742 | 1,085,125
Subordinated debentures | 24,229 | 24,229
Other borrowed money | 61,563 | 44,000
Estimate of Fair Value Measurement [Member] |  |
Cash and short-term investments | 104,092 | 60,156
Fair Value | 347,332 | 353,066
Federal Home Loan Bank stock | 4,288 | 2,978
Loans held for sale | 10,076 |
Loans, net | 938,475 | 769,809
Deposits | 1,294,506 | 1,086,503
Subordinated debentures | 24,229 | 24,229
Other borrowed money | 60,585 | 44,032
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Cash and short-term investments | 104,092 | 60,156
Fair Value |  |
Federal Home Loan Bank stock |  |
Loans held for sale |  |
Loans, net |  |
Deposits |  |
Subordinated debentures |  |
Other borrowed money |  |
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Cash and short-term investments |  |
Fair Value | 345,310 | 351,057
Federal Home Loan Bank stock | 4,288 | 2,978
Loans held for sale | 10,076 |
Loans, net |  |
Deposits | 1,294,506 | 1,086,503
Subordinated debentures | 24,229 | 24,229
Other borrowed money | 60,585 | 44,032
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Cash and short-term investments |  |
Fair Value | 2,022 | 2,009
Federal Home Loan Bank stock |  |
Loans held for sale |  |
Loans, net | 938,475 | 769,809
Deposits |  |
Subordinated debentures |  |
Other borrowed money |  |

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- Definition Amount 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + Details
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- Definition Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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