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Note 3 - Business Combination and Pending Acquisition (Details Textual) - USD ($) |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Apr. 01, 2019 | Dec. 31, 2019 | Sep. 30, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Goodwill, Ending Balance |  | $ 28,388,000 |  | $ 28,388,000 |  |  |  | $ 11,942,000 |  |  |  | $ 28,388,000 | $ 11,942,000 | $ 11,942,000
Business Combination, Acquisition Related Costs |  |  |  | 281,000 | $ 206,000 | $ 3,301,000 | $ 311,000 | 128,000 | $ 200,000 | $ 0 | $ 0 | 4,099,000 | 328,000 |
Assets, Total |  | 1,654,145,000 |  | 1,654,145,000 |  |  |  | 1,290,893,000 |  |  |  | 1,654,145,000 | 1,290,893,000 |
Liabilities, Total |  | 1,409,693,000 |  | 1,409,693,000 |  |  |  | 1,093,525,000 |  |  |  | 1,409,693,000 | 1,093,525,000 |
Stockholders' Equity Attributable to Parent, Ending Balance |  | 244,452,000 |  | 244,452,000 |  |  |  | $ 197,368,000 |  |  |  | 244,452,000 | 197,368,000 | $ 188,443,000
Covenant Financial Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets, Total |  | 516,000,000 |  | 516,000,000 |  |  |  |  |  |  |  | 516,000,000 |  |
Liabilities, Total |  | 474,000,000 |  | 474,000,000 |  |  |  |  |  |  |  | 474,000,000 |  |
Stockholders' Equity Attributable to Parent, Ending Balance |  | 42,000,000 |  | 42,000,000 |  |  |  |  |  |  |  | 42,000,000 |  |
Monument Bancorp, Inc [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total | $ 42,651,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Businesses, Cash, Net of Stock Issuance Costs | $ 9,517,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | 1,279,825 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable | $ 32,953,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Equity Interest Issuance Costs | 181,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Assets |  |  |  | 216,000 |  |  |  |  |  |  |  |  |  |
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Other Liabilities |  |  |  | (14,000) |  |  |  |  |  |  |  |  |  |
Goodwill, Purchase Accounting Adjustments |  |  |  | (230,000) |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets, Total | 375,138,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities, Total | 348,933,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, Ending Balance | 16,446,000 | 16,446,000 |  | 16,446,000 |  |  |  |  |  |  |  | 16,446,000 |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debt | 12,375,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  |  | 3,812,000 | 328,000 |
Business Combination, Acquisition Related Costs, Net of Tax |  |  |  |  |  |  |  |  |  |  |  | 3,270,000 | $ 305,000 |
Monument Bancorp, Inc [Member] | Subordinated debt, Redeemed April 1, 2019 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debt | 5,375,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Monument Bancorp, Inc [Member] | Subordinated debt, Redeemed April 1, 2022 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Subordinated Debt | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Early Repayment of Subordinated Debt |  |  |  | 500,000 |  |  |  |  |  |  |  |  |  |
Gain (Loss) on Extinguishment of Debt, Total |  |  |  | $ (10,000) |  |  |  |  |  |  |  |  |  |
Monument Bancorp, Inc [Member] | Core Deposits [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total | $ 1,461,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life | 4 years 146 days |  |  |  |  |  |  |  |  |  |  |  |  |
Monument Bancorp, Inc [Member] | Federal Home Loan Bank of Pittsburgh [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal Home Loan Bank Stock | $ 5,478,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Covenant Financial Inc. [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Consideration Transferred, Total |  | $ 77,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  |  |  |  |  |  |  |  |  |  | $ 287,000 |  |
Business Combination, Percent Paid in Cash |  | 25.00% |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Percent Paid in Equity |  | 75.00% |  |  |  |  |  |  |  |  |  |  |  |
Covenant Financial Inc. [Member] | Forecast [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs |  |  | $ 8,000,000 |  |  |  |  |  |  |  |  |  |  |
Business Combination, Acquisition Related Costs, Net of Tax |  |  | $ 6,600,000 |  |  |  |  |  |  |  |  |  |  |

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