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CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Parenthetical) - $ / shares | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Shares outstanding |  |  | 18,974,703 |
Common stock options exercised, shares |  |  | 2,820 |
Issuance of shares for Employee Stock Purchase Plan, shares | 6,347 | 46,935 | 14,772 | 46,935
Shares outstanding | 18,829,877 |  | 18,829,877 |
Common Stock [Member] |  |  |  |
Shares outstanding | 19,034,870 | 18,852,523 | 18,974,703 | 18,926,810
Restricted stock units issued, shares | 21,200 | 7,606 | 288,348 | 157,690
Restricted stock units/awards repurchased on vesting to pay taxes, shares | 7,096 | 2,580 | 71,749 | 39,686
Cash dividends declared on common stock, per share | $ 0.05 | $ 0.05 | $ 0.10 | $ 0.10
Share repurchase, share | 234,722 |  | 392,755 | 220,222
Common stock options exercised, shares | 2,000 | 2,800 | 2,820 | 8,400
Common stock options exercised, used to exercise, shares |  | 2,149 | 62 | 2,149
Common stock options exercised, net of shares used to exercise, shares |  | 651 | 2,758 | 6,251
Exercise of warrants, shares | 20,000 |  | 40,000 | 20,000
Exercise of warrants, used to exercise, shares | 12,722 |  | 26,200 | 13,469
Exercise of warrants, net of shares used to exercise, shares | 7,278 |  | 13,800 | 6,531
Issuance of shares for Employee Stock Purchase Plan, shares | 6,347 | 46,935 | 14,772 | 46,935
Issuance of common stock for acquisition, shares |  |  |  | 20,826
Shares outstanding | 18,829,877 | 18,905,135 | 18,829,877 | 18,905,135

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