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Consolidated Statements of Stockholders' Equity (Unaudited) (Parentheticals) - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Retained Earnings [Member]    
Cash dividends declared, per share (in dollars per share) $ 0.09 $ 0.07
Common stock allocated by ESOP (in shares) 3,607 3,607