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Note 1 - Basis of Presentation (Details Textual) $ in Thousands | 9 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Sep. 30, 2020 USD ($) | Dec. 31, 2020 USD ($) | Jun. 30, 2020 USD ($) | Dec. 31, 2019 USD ($) | Sep. 30, 2019 USD ($) | Jun. 30, 2019 USD ($) | Dec. 31, 2018 USD ($)
Number of Operating Segments | 1 |  |  |  |  |  |  |
Financing Receivable, Number of Payment Deferrals | 3,362 |  |  |  |  |  |  |
Financing Receivable, Deferred Payments | $ 426,450 |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance | 230,464 |  |  | $ 219,535 | [1] |  |  |
Loans and Leases Receivable, Allowance, Ending Balance | 27,277 |  | $ 23,758 | 18,425 | [1] | $ 18,493 | $ 18,540 | $ 18,267
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance | 0 |  |  |  |  |  |  |
Accounting Standards Update 2016-13 [Member] | Forecast [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance |  | $ 2,890 |  |  |  |  |  |
Accounting Standards Update 2016-13 [Member] | Forecast [Member] | Highlands [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance |  | 4,440 |  |  |  |  |  |
Accounting Standards Update 2016-13 [Member] | Forecast [Member] | Highlands [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance |  | 7,040 |  |  |  |  |  |
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member] | Forecast [Member] |  |  |  |  |  |  |  |
Retained Earnings (Accumulated Deficit), Ending Balance |  | $ 5,610 |  |  |  |  |  |
Commercial Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Deferred Payments | 102,540 |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance | 15,549 |  | 13,909 | 10,235 |  | 10,299 | 10,215 | 10,499
Commercial Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Deferred Payments | 69,320 |  |  |  |  |  |  |
Consumer Portfolio Segment [Member] |  |  |  |  |  |  |  |
Financing Receivable, Deferred Payments | 13,090 |  |  |  |  |  |  |
Consumer Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Deferred Payments | 5,090 |  |  |  |  |  |  |
Consumer Real Estate Portfolio Segment [Member] |  |  |  |  |  |  |  |
Loans and Leases Receivable, Allowance, Ending Balance | $ 9,119 |  | $ 7,294 | $ 6,325 |  | $ 6,386 | $ 6,881 | $ 6,732
Consumer Real Estate Portfolio Segment [Member] | Home Equity Loan [Member] |  |  |  |  |  |  |  |
Financing Receivable, Number Closed Under Paycheck Protection Program Under CARES Act | 803 |  |  |  |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 62,740 |  |  |  |  |  |  |
[1] | Derived from audited financial statements

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