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Note 3 - Acquisition Activity (Details Textual) $ / shares in Units, $ in Thousands |  |  |  | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 24, 2019 USD ($) $ / shares shares | Jul. 26, 2018 USD ($) $ / shares shares | Jul. 25, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Dec. 17, 2018 USD ($) | May 31, 2004 USD ($)
Payments to Acquire Businesses, Net of Cash Acquired, Total |  |  |  | $ 15,743 | $ 8,689 |  |
Number of Banking Centers |  | 19 |  |  |  |  |
First Personal Financial Corporation [Member] |  |  |  |  |  |  |
Business Acquisition, Number of Shares Given Per Share of Acquired Company, Stockholders Holding 100 Shares or More | shares |  | 0.1246 |  |  |  |  |
Business Acquisition, Cash Paid Per Share of Acquired Company, Stockholders Holding 100 or More Shares | $ / shares |  | $ 6.67 |  |  |  |  |
Business Acquisition, Cash Paid Per Share of Acquired Company, Holding Less Than 100 Shares | $ / shares |  | $ 12.12 |  |  |  |  |
Business Acquisition, Number of Shares Given Per Share of Acquired Company, Less Than 100 Shares | shares |  | 0 |  |  |  |  |
Business Acquisition, Fractional Shares Multiplier | $ / shares |  | $ 42.95 |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares |  | 161,875 |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total |  | $ 8,689 |  |  |  |  |
Business Combination, Consideration Transferred, Total |  | 15,617 | $ 15,600 |  |  |  |
Business Acquisition, Transaction Costs |  |  |  | 1,800 |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt |  | $ 4,124 |  |  |  |  |
First Personal Financial Corporation [Member] | Trust Preferred Securities Debt [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Long-term Debt |  |  |  |  |  |  | $ 4,124
Business Combination, Recognized Identifiable Assets Acquired And Liabilities Assumed, Debt Redeemed |  |  |  |  |  | $ 4,124 |
First Personal Financial Corporation [Member] | Trust Preferred Securities Debt [Member] | London Interbank Offered Rate (LIBOR) [Member] |  |  |  |  |  |  |
Debt Instrument, Basis Spread on Variable Rate |  | 2.75% |  |  |  |  |
First Personal Financial Corporation [Member] | Minimum [Member] |  |  |  |  |  |  |
Business Acquisition, Number of Held Shares of Acquired Company | shares |  | 100 |  |  |  |  |
First Personal Financial Corporation [Member] | Maximum [Member] |  |  |  |  |  |  |
Business Acquisition, Number of Held Shares of Acquired Company | shares | 100 | 100 |  |  |  |  |
AJS Bancorp, Inc [Member] |  |  |  |  |  |  |
Business Acquisition, Number of Shares Given Per Share of Acquired Company, Stockholders Holding 100 Shares or More | shares | 0.203 |  |  |  |  |  |
Business Acquisition, Cash Paid Per Share of Acquired Company, Stockholders Holding 100 or More Shares | $ / shares | $ 7.20 |  |  |  |  |  |
Business Acquisition, Cash Paid Per Share of Acquired Company, Holding Less Than 100 Shares | $ / shares | $ 16 |  |  |  |  |  |
Business Acquisition, Number of Shares Given Per Share of Acquired Company, Less Than 100 Shares | shares | 0 |  |  |  |  |  |
Business Acquisition, Fractional Shares Multiplier | $ / shares | $ 43.01 |  |  |  |  |  |
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares | shares | 416,478 |  |  |  |  |  |
Payments to Acquire Businesses, Net of Cash Acquired, Total | $ 15,743 |  |  |  |  |  |
Business Combination, Consideration Transferred, Total | $ 33,235 |  |  |  |  |  |
Business Acquisition, Transaction Costs |  |  |  | $ 2,100 |  |  |
Number of Banking Centers | 22 |  |  |  |  |  |
AJS Bancorp, Inc [Member] | Minimum [Member] |  |  |  |  |  |  |
Business Acquisition, Number of Held Shares of Acquired Company | shares | 100 |  |  |  |  |  |

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