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Note 3 - Loans and Allowance for Loan Losses - Age Analysis of Past Due Loans (Details) - USD ($) | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Past due loans |  | $ 3,041,000 | $ 1,884,000 |
Current loans |  | 3,213,317,000 | 2,854,783,000 |
Loans |  | 3,216,358,000 | 2,856,667,000 | $ 2,753,085,000
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] |  |  |  |
Past due loans |  | 1,074,000 | 325,000 |
Current loans |  | 2,792,888,000 | 2,441,219,000 |
Loans |  | 2,793,962,000 | 2,441,544,000 | 2,360,106,000
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |
Past due loans |  | 433,000 | 0 |
Current loans |  | 1,144,990,000 | 846,551,000 |
Loans | [1] | 1,145,423,000 | 846,551,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |
Past due loans |  | 0 | 191,000 |
Current loans |  | 55,055,000 | 55,928,000 |
Loans |  | 55,055,000 | 56,119,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 618,000 | 134,000 |
Current loans |  | 529,335,000 | 578,869,000 |
Loans |  | 529,953,000 | 579,003,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 23,000 | 0 |
Current loans |  | 917,413,000 | 835,346,000 |
Loans |  | 917,436,000 | 835,346,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Current loans |  | 146,095,000 | 124,525,000 |
Loans |  | 146,095,000 | 124,525,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Retail Portfolio Segment [Member] |  |  |  |
Past due loans |  | 1,967,000 | 1,559,000 |
Current loans |  | 420,429,000 | 413,564,000 |
Loans |  | 422,396,000 | 415,123,000 | $ 392,979,000
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |
Past due loans |  | 231,000 | 256,000 |
Current loans |  | 61,389,000 | 75,118,000 |
Loans |  | 61,620,000 | 75,374,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |
Past due loans |  | 1,736,000 | 1,303,000 |
Current loans |  | 359,040,000 | 338,446,000 |
Loans |  | 360,776,000 | 339,749,000 |
Loans past due 90 days or more still accruing interest |  | 0 | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Past due loans |  | 1,520,000 | 1,107,000 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Past due loans |  | 261,000 | 191,000 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |
Past due loans |  | 261,000 | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |
Past due loans |  | 0 | 191,000 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 30 to 59 Days Past Due [Member] | Retail Portfolio Segment [Member] |  |  |  |
Past due loans |  | 1,259,000 | 916,000 |
Financial Asset, 30 to 59 Days Past Due [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |
Past due loans |  | 112,000 | 171,000 |
Financial Asset, 30 to 59 Days Past Due [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |
Past due loans |  | 1,147,000 | 745,000 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Past due loans |  | 681,000 | 94,000 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Past due loans |  | 369,000 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |
Past due loans |  | 172,000 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 197,000 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, 60 to 89 Days Past Due [Member] | Retail Portfolio Segment [Member] |  |  |  |
Past due loans |  | 312,000 | 94,000 |
Financial Asset, 60 to 89 Days Past Due [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |
Past due loans |  | 65,000 | 65,000 |
Financial Asset, 60 to 89 Days Past Due [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |
Past due loans |  | 247,000 | 29,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Past due loans |  | 840,000 | 683,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Past due loans |  | 444,000 | 134,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Vacant Land and Land Development and Residential Construction Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 421,000 | 134,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Non Owner Occupied Loan [Member] |  |  |  |
Past due loans |  | 23,000 | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial Portfolio Segment [Member] | Real Estate Multi Family and Residential Rental Loan [Member] |  |  |  |
Past due loans |  | 0 | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Retail Portfolio Segment [Member] |  |  |  |
Past due loans |  | 396,000 | 549,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Retail Portfolio Segment [Member] | Home Equity and Other [Member] |  |  |  |
Past due loans |  | 54,000 | 20,000 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Retail Portfolio Segment [Member] | One to Four Family Mortgages [Member] |  |  |  |
Past due loans |  | $ 342,000 | $ 529,000 |
[1] | For December 31, 2020, includes $365 million in loans originated under the Paycheck Protection Program.

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