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Note 3 - Loans and Allowance for Loan Losses - Impaired Loans (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
With no related allowance recorded, unpaid principal balance | $ 16,997,000 | $ 26,892,000
With no related allowance recorded, principal balance | 15,715,000 | 24,738,000
With no related allowance recorded, average recorded principal balance | 19,857,000 | 17,315,000
With related allowance recorded, unpaid principal balance | 3,671,000 | 2,266,000
With related allowance recorded, principal balance | 3,651,000 | 2,220,000
Related allowance | 546,000 | 551,000
With related allowance recorded, average recorded principal balance | 3,440,000 | 2,742,000
Total unpaid principal balance | 20,668,000 | 29,158,000
Total principal balance | 19,366,000 | 26,958,000
Total average recorded principal balance | 23,297,000 | 20,057,000
Commercial Portfolio Segment [Member] |  |
With no related allowance recorded, unpaid principal balance | 12,658,000 | 21,365,000
With no related allowance recorded, principal balance | 12,583,000 | 21,176,000
With no related allowance recorded, average recorded principal balance | 16,434,000 | 13,652,000
With related allowance recorded, unpaid principal balance | 3,099,000 | 1,268,000
With related allowance recorded, principal balance | 3,099,000 | 1,239,000
Related allowance | 354,000 | 138,000
With related allowance recorded, average recorded principal balance | 2,689,000 | 1,726,000
Total unpaid principal balance | 15,757,000 | 22,633,000
Total principal balance | 15,682,000 | 22,415,000
Total average recorded principal balance | 19,123,000 | 15,378,000
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |
With no related allowance recorded, unpaid principal balance | 2,893,000 | 6,242,000
With no related allowance recorded, principal balance | 2,818,000 | 6,242,000
With no related allowance recorded, average recorded principal balance | 3,632,000 | 7,874,000
With related allowance recorded, unpaid principal balance | 2,192,000 | 343,000
With related allowance recorded, principal balance | 2,192,000 | 343,000
Related allowance | 266,000 | 53,000
With related allowance recorded, average recorded principal balance | 1,732,000 | 971,000
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |
With no related allowance recorded, unpaid principal balance | 0 | 0
With no related allowance recorded, principal balance | 0 | 0
With no related allowance recorded, average recorded principal balance | 0 | 187,000
With related allowance recorded, unpaid principal balance | 0 | 0
With related allowance recorded, principal balance | 0 | 0
Related allowance | 0 | 0
With related allowance recorded, average recorded principal balance | 0 | 77,000
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |
With no related allowance recorded, unpaid principal balance | 9,674,000 | 14,782,000
With no related allowance recorded, principal balance | 9,674,000 | 14,593,000
With no related allowance recorded, average recorded principal balance | 12,634,000 | 5,361,000
With related allowance recorded, unpaid principal balance | 761,000 | 763,000
With related allowance recorded, principal balance | 761,000 | 734,000
Related allowance | 84,000 | 77,000
With related allowance recorded, average recorded principal balance | 803,000 | 578,000
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |
With no related allowance recorded, unpaid principal balance | 0 | 341,000
With no related allowance recorded, principal balance | 0 | 341,000
With no related allowance recorded, average recorded principal balance | 131,000 | 227,000
With related allowance recorded, unpaid principal balance | 146,000 | 162,000
With related allowance recorded, principal balance | 146,000 | 162,000
Related allowance | 4,000 | 8,000
With related allowance recorded, average recorded principal balance | 154,000 | 100,000
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |
With no related allowance recorded, unpaid principal balance | 91,000 | 0
With no related allowance recorded, principal balance | 91,000 | 0
With no related allowance recorded, average recorded principal balance | 37,000 | 3,000
With related allowance recorded, unpaid principal balance | 0 | 0
With related allowance recorded, principal balance | 0 | 0
Related allowance | 0 | 0
With related allowance recorded, average recorded principal balance | 0 | 0
Retail Portfolio Segment [Member] |  |
With no related allowance recorded, unpaid principal balance | 4,339,000 | 5,527,000
With no related allowance recorded, principal balance | 3,132,000 | 3,562,000
With no related allowance recorded, average recorded principal balance | 3,423,000 | 3,663,000
With related allowance recorded, unpaid principal balance | 572,000 | 998,000
With related allowance recorded, principal balance | 552,000 | 981,000
Related allowance | 192,000 | 413,000
With related allowance recorded, average recorded principal balance | 751,000 | 1,016,000
Total unpaid principal balance | 4,911,000 | 6,525,000
Total principal balance | 3,684,000 | 4,543,000
Total average recorded principal balance | 4,174,000 | 4,679,000
Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |
With no related allowance recorded, unpaid principal balance | 1,173,000 | 1,072,000
With no related allowance recorded, principal balance | 1,107,000 | 987,000
With no related allowance recorded, average recorded principal balance | 1,096,000 | 1,216,000
With related allowance recorded, unpaid principal balance | 160,000 | 300,000
With related allowance recorded, principal balance | 140,000 | 283,000
Related allowance | 123,000 | 241,000
With related allowance recorded, average recorded principal balance | 214,000 | 421,000
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |
With no related allowance recorded, unpaid principal balance | 3,166,000 | 4,455,000
With no related allowance recorded, principal balance | 2,025,000 | 2,575,000
With no related allowance recorded, average recorded principal balance | 2,327,000 | 2,447,000
With related allowance recorded, unpaid principal balance | 412,000 | 698,000
With related allowance recorded, principal balance | 412,000 | 698,000
Related allowance | 69,000 | 172,000
With related allowance recorded, average recorded principal balance | $ 537,000 | $ 595,000

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