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Note 5 - Loans and Allowance for Loan Losses - Aging of Recorded Investment (Details) - USD ($) $ in Thousands | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Total Past Due |  | $ 35,922 | $ 15,830 |
Loans Not Past Due |  | 2,719,231 | 2,181,104 |
Total Loans | [1] | 2,755,153 | 2,196,934 |
Non-accrual Loans |  | 15,993 | 11,437 | [2]
Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 9,998 | 3,717 |
Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 13,019 | 1,560 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 12,905 | 10,553 |
Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member] |  |  |  |
Total Past Due |  | 761 | 0 |
Loans Not Past Due |  | 182,808 | 96,020 |
Total Loans | [1] | 183,569 | 96,020 |
Non-accrual Loans | [2] | 761 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 0 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 400 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Construction And Land Development Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 361 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] |  |  |  |
Total Past Due |  | 20,537 | 725 |
Loans Not Past Due |  | 954,650 | 792,543 |
Total Loans |  | 975,187 | 793,268 |
Non-accrual Loans | [2] | 1,168 | 725 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 7,578 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 11,791 | 0 |
Commercial Real Estate Portfolio Segment [Member] | Commercial Real Estate [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 1,168 | 725 |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member] |  |  |  |
Total Past Due |  | 3,998 | 3,464 |
Loans Not Past Due |  | 1,159,984 | 953,790 |
Total Loans | [1] | 1,163,982 | 957,254 |
Non-accrual Loans | [2] | 2,747 | 1,334 |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 2,408 | 1,454 |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 791 | 1,560 |
Commercial Real Estate Portfolio Segment [Member] | Single Family Residential Mortgages Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 799 | 450 |
Commercial Portfolio Segment [Member] | Other Loans [Member] |  |  |  |
Total Past Due |  | 882 | 0 |
Loans Not Past Due |  | 317,009 | 274,586 |
Total Loans | [1] | 317,891 | 274,586 |
Non-accrual Loans | [2] | 1,622 | 0 |
Commercial Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 0 | 0 |
Commercial Portfolio Segment [Member] | Other Loans [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 882 | 0 |
Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member] |  |  |  |
Total Past Due |  | 9,717 | 11,641 |
Loans Not Past Due |  | 101,476 | 63,344 |
Total Loans | [1] | 111,193 | 74,985 |
Non-accrual Loans | [2] | 9,680 | 9,378 |
Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 0 | 2,263 |
Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 37 | 0 |
Commercial Portfolio Segment [Member] | Small Business Administration Agency Securities [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | 9,680 | 9,378 |
Other Financing Receivables [Member] |  |  |  |
Total Past Due |  | 27 | 0 |
Loans Not Past Due |  | 3,304 | 821 |
Total Loans | [1] | 3,331 | 821 |
Non-accrual Loans | [2] | 15 | 0 |
Other Financing Receivables [Member] | Financial Asset, 30 to 59 Days Past Due [Member] |  |  |  |
Total Past Due |  | 12 | 0 |
Other Financing Receivables [Member] | Financial Asset, 60 to 89 Days Past Due [Member] |  |  |  |
Total Past Due |  | 0 | 0 |
Other Financing Receivables [Member] | Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |  |  |
Total Past Due |  | $ 15 | $ 0 |
[1] | Loans, net of deferred fees
[2] | Included in total loans.

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