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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parentheticals) - $ / shares | 3 Months Ended
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Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019
Cash dividends declared per common share (in dollars per share) | $ 0.06 |  | $ 0.06 |
Common Stock [Member] |  |  |  |
Cash dividends declared per common share (in dollars per share) | $ 0.06 | $ 0.06 | $ 0.06 | $ 0.06
Repurchase and cancellation of common stock as a result of share repurchase program (in shares) |  | 100,932 |  |
Issuance of shares of common stock as a result of stock purchased under the Employee Stock Purchase Plan (in shares) | 16,413 | 5,553 | 11,346 | 4,446
Issuance of shares of common stock as s result of stock options exercised (in shares) | 975 | 31,729 | 2,414 | 25,238
Restricted stock awards (in shares) |  | 10,300 | 4,769 | 12,719
Exchange of shares of common stock in connection with stock options exercised and restricted stock vested (in shares) | 513 | 1,012 | 1,032 | 5,169

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