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Note 12 - Fair Value Measurements and Fair Values of Financial Instruments - Assets Measured at Fair Value (Details) - USD ($) | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Total, fair value | $ 342,416,000 | $ 346,723,000
Marketable equity security | 994,000 | 979,000
Unpaid principal - with allowance | 6,709,000 | 3,375,000
Valuation allowance | (2,227,000) | (1,051,000)
Impaired loans, net | 6,709,000 | 3,375,000
US Government Agencies Debt Securities [Member] |  |
Total, fair value | 16,408,000 | 17,000,000
Obligations of States and Political Subdivisions Tax Exempt [Member] |  |
Total, fair value | 81,072,000 | 70,760,000
Obligations of States and Political Subdivisions Taxable [Member] |  |
Total, fair value | 37,074,000 | 36,303,000
Residential Pass-Through Securities [Member] |  |
Total, fair value | 55,752,000 | 59,210,000
Residential Collateralized Mortgage Obligations [Member] |  |
Total, fair value | 103,556,000 | 114,723,000
Commercial Mortgage Backed Securities [Member] |  |
Total, fair value | 48,554,000 | 48,727,000
Fair Value, Recurring [Member] |  |
Total, fair value | 342,416,000 | 346,723,000
Marketable equity security | 994,000 | 979,000
Servicing rights | 1,226,000 | 1,277,000
Total asset fair value measurements | 344,636,000 | 348,979,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Marketable equity security | 994,000 | 979,000
Servicing rights | 0 | 0
Total asset fair value measurements | 994,000 | 979,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 342,416,000 | 346,723,000
Marketable equity security | 0 | 0
Servicing rights | 0 | 0
Total asset fair value measurements | 342,416,000 | 346,723,000
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Marketable equity security | 0 | 0
Servicing rights | 1,226,000 | 1,277,000
Total asset fair value measurements | 1,226,000 | 1,277,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] |  |
Total, fair value | 16,408,000 | 17,000,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 16,408,000 | 17,000,000
Fair Value, Recurring [Member] | US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Tax Exempt [Member] |  |
Total, fair value | 81,072,000 | 70,760,000
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Tax Exempt [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Tax Exempt [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 81,072,000 | 70,760,000
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Tax Exempt [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Taxable [Member] |  |
Total, fair value | 37,074,000 | 36,303,000
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Taxable [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Taxable [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 37,074,000 | 36,303,000
Fair Value, Recurring [Member] | Obligations of States and Political Subdivisions Taxable [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Residential Pass-Through Securities [Member] |  |
Total, fair value | 55,752,000 | 59,210,000
Fair Value, Recurring [Member] | Residential Pass-Through Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Residential Pass-Through Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 55,752,000 | 59,210,000
Fair Value, Recurring [Member] | Residential Pass-Through Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Residential Collateralized Mortgage Obligations [Member] |  |
Total, fair value | 103,556,000 | 114,723,000
Fair Value, Recurring [Member] | Residential Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Residential Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 103,556,000 | 114,723,000
Fair Value, Recurring [Member] | Residential Collateralized Mortgage Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] |  |
Total, fair value | 48,554,000 | 48,727,000
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total, fair value | 48,554,000 | 48,727,000
Fair Value, Recurring [Member] | Commercial Mortgage Backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total, fair value | 0 | 0
Fair Value, Nonrecurring [Member] |  |
Total asset fair value measurements | 6,167,000 | 5,210,000
Unpaid principal - with allowance | 6,709,000 | 3,375,000
Valuation allowance | (2,227,000) | (1,051,000)
Impaired loans, net | 4,482,000 | 2,324,000
Foreclosed assets held for sale | 1,685,000 | 2,886,000
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 1 [Member] |  |
Total asset fair value measurements | 0 | 0
Unpaid principal - with allowance | 0 | 0
Valuation allowance | 0 | 0
Impaired loans, net | 0 | 0
Foreclosed assets held for sale | 0 | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 2 [Member] |  |
Total asset fair value measurements | 0 | 0
Unpaid principal - with allowance | 0 | 0
Valuation allowance | 0 | 0
Impaired loans, net | 0 | 0
Foreclosed assets held for sale | 0 | 0
Fair Value, Nonrecurring [Member] | Fair Value, Inputs, Level 3 [Member] |  |
Total asset fair value measurements | 6,167,000 | 5,210,000
Unpaid principal - with allowance | 6,709,000 | 3,375,000
Valuation allowance | (2,227,000) | (1,051,000)
Impaired loans, net | 4,482,000 | 2,324,000
Foreclosed assets held for sale | $ 1,685,000 | $ 2,886,000

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