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Note 2 - Recent Accounting Pronouncements (Details Textual) - USD ($) | Dec. 31, 2019 | Jan. 01, 2019 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | --- | ---
Other Assets [Member] |  |  |  |  |
Operating Lease, Right-of-Use Asset | $ 1,637,000 |  |  |  |
Accrued Interest and Other Liabilities [Member] |  |  |  |  |
Operating Lease, Liability, Total | $ 1,637,000 |  |  |  |
Accounting Standards Update 2016-02 [Member] |  |  |  |  |
Operating Lease, Liability, Total |  | $ 1,132,000 |  |  |
Operating Lease, Right-of-Use Asset |  | $ 1,132,000 |  |  |
Accounting Standards Update 2018-02 [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | $ 0 | $ 0 | [1]
Accounting Standards Update 2018-02 [Member] | Retained Earnings [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | 325,000 | 325,000 | [1]
Accounting Standards Update 2017-08 [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | 0 | 0 | [2]
Accounting Standards Update 2017-08 [Member] | Retained Earnings [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | (26,000) | (26,000) | [2]
Accounting Standards Update 2016-01 [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | 0 | 0 | [3]
Accounting Standards Update 2016-01 [Member] | Retained Earnings [Member] |  |  |  |  |
Cumulative Effect of New Accounting Principle in Period of Adoption |  |  | $ (22,000) | $ (22,000) | [3]
[1] | As described in more detail in the Recent Accounting Pronouncements - Adopted section of Note 2, this reclassification resulted from adoption of Accounting Standards Update (ASU) 2018-02, Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income, effective January 1, 2018.
[2] | As described in more detail in the Recent Accounting Pronouncements - Adopted section of Note 2, this reclassification resulted from adoption of ASU 2017-08, Receivables - Nonrefundable Fees and Other Costs (Subtopic 310-20), effective January 1, 2018.
[3] | As described in more detail in the Recent Accounting Pronouncements - Adopted section of Note 2, this reclassification resulted from adoption of ASU 2016-01, Recognition and Measurement of Financial Assets and Liabilities, effective January 1, 2018.

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