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Note 8 - Loans (Details Textual) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 31, 2018 USD ($) | Apr. 01, 2019 USD ($) | Dec. 31, 2017 USD ($)
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums, Total | $ 2,482,000 | $ 1,999,000 |  |
Loans and Leases Receivable, Gross, Total | $ 1,182,222,000 | 827,563,000 |  |
Number of Special Mention Loans | 60 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 1,051,000 | 1,605,000 |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance | 9,836,000 | 9,309,000 |  | $ 8,856,000
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 0 | 0 |  |
Financing Receivables, Impaired, Troubled Debt Restructuring, Write-down | 0 | 0 |  |
Impaired Loans [Member] |  |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 0 | $ 0 |  |
Loans Upgraded from Substandard to Special Mention in Following Fiscal Year [Member] |  |  |  |
Number of Loans |  | 2 |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance |  | $ 1,365,000 |  |
Commercial Portfolio Segment [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 578,901,000 | 353,627,000 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 875,000 | 1,489,000 |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance | 4,788,000 | 4,591,000 |  | 4,235,000
Commercial Portfolio Segment [Member] | Largest Loan Balance [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 1,261,000 |  |  |
Number of Loans | 1 |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 678,000 |  |  |
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 33,555,000 | 11,962,000 |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | 678,000 | 0 |  |
Financing Receivable, Allowance for Credit Loss, Ending Balance | 966,000 | 110,000 |  | $ 150,000
Special Mention [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 19,658,000 | 7,394,000 |  |
Average Balance of Loans Receivable | 328,000 | $ 140,000 |  |
Number of Loans |  | 53 |  |
Loans Receivable, Balance of Loans of $500,000 or More | $ 15,357,000 |  |  |
Loans Receivable Balance, Percentage of Loans of $500,000 or More | 78.00% |  |  |
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment | $ 0 | $ 0 |  |
Loans and Leases Receivable, Balances Greater Than $500,000 | 15,357,000 | 11,922,000 |  |
Special Mention [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 19,327,000 | 6,222,000 |  |
Loans of $500,000 or More, Number of Loans | 9 |  |  |
Loans of $500,000 or More, Number of Borrowers | 7 |  |  |
Special Mention [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 0 | 0 |  |
Substandard [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 18,504,000 | 19,556,000 |  |
Average Balance of Loans Receivable | $ 82,000 | $ 91,000 |  |
Number of Loans | 225 | 215 |  |
Loans and Leases Receivable, Balances Greater Than $500,000 | $ 4,185,000 |  |  |
Loans and Leases Receivable, Balances Greater Than $500,000, Percent of Loans | 23.00% |  |  |
Substandard [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 8,279,000 | $ 10,564,000 |  |
Substandard [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 1,331,000 | 75,000 |  |
Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 441,000 |  |  |
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 364,000 |  |  |
Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | 0 |  |  |
Financial Asset Originated [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 4,135,000 | $ 0 |  |
Number of Loans | 2 |  |  |
Financial Asset Originated [Member] | Special Mention [Member] |  |  |  |
Loans and Leases Receivable, Gross, Total | $ 3,500,000 |  |  |
Loans and Leases Receivable, Liquidation Value | 1,500,000 |  |  |
Loans and Leases Receivable, Liquidation Shortfall | $ 2,000,000 |  |  |
Loans Receivable 1 [Member] | Credit Availability Concentration Risk [Member] |  |  |  |
Concentration Risk, Percentage | 0.00% |  |  |
Monument Bancorp, Inc [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | $ 259,295,000 |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable, Market Rate Adjustment |  |  | (1,807,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Credit Fair Value Adjustment on Non-credit Impaired Loans |  |  | (1,914,000) |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Credit Fair Value Adjustment on Impaired Loans |  |  | (318,000) |
Monument Bancorp, Inc [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | 144,968,000 |
Monument Bancorp, Inc [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | 4,617,000 |
Monument Bancorp, Inc [Member] | Financial Asset Acquired with Credit Deterioration [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | 441,000 |
Monument Bancorp, Inc [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | 364,000 |
Monument Bancorp, Inc [Member] | Financial Asset Acquired with Credit Deterioration [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Loans Receivable |  |  | $ 0 |

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