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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands | Common Stock [Member] Common Shares Class A Non-Voting [Member] | Common Stock [Member] Common Shares Class B Voting [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | Total
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2017 |  | $ 8,333 |  | $ 882 |  | $ 99,526 | $ 37,903 | $ 146,644
Balance (in shares) at Dec. 31, 2017 |  | 8,333 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 3,478 | 3,478
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,168) | (2,168)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 3 |  | $ 0 |  | 88 | 0 | 91
Dividends reinvestment plan (in shares) |  | 3 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 0 |  | $ 0 |  | 47 | 0 | 47
Employee stock options and awards (in shares) | [3] | 0 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 12 |  | $ 0 |  | 290 | 0 | 302
Employee Retirement Plan (in shares) | [1] | 12 | [2],[3] | 0 | [4] |  |  |
Balance at Mar. 31, 2018 |  | $ 8,348 |  | $ 882 |  | 99,951 | 39,213 | 148,394
Balance (in shares) at Mar. 31, 2018 |  | 8,348 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Dec. 31, 2018 |  | $ 8,368 |  | $ 882 |  | 100,639 | 43,362 | 153,251
Balance (in shares) at Dec. 31, 2018 |  | 8,368 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 3,590 | 3,590
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,241) | (2,241)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 2 |  | $ 0 |  | 85 | 0 | 87
Dividends reinvestment plan (in shares) |  | 2 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 14 |  | $ 0 |  | 263 | 0 | 277
Employee stock options and awards (in shares) | [3] | 14 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 2 |  | $ 0 |  | 76 | 0 | 78
Employee Retirement Plan (in shares) | [1] | 2 | [2],[3] | 0 | [4] |  |  |
Balance at Mar. 31, 2019 |  | $ 8,386 |  | $ 882 |  | $ 101,063 | $ 44,711 | $ 155,042
Balance (in shares) at Mar. 31, 2019 |  | 8,386 | [1],[2],[3] | 882 | [4] |  |  |
[1] | Artesian Resources Corporation registered 500,000 shares of Class A Common Stock available for purchase through the Artesian Retirement Plan and the Artesian Supplemental Retirement Plan.
[2] | At March 31, 2019, and March 31, 2018, Class A Common Stock had 15,000,000 shares authorized. For the same periods, shares issued, inclusive of treasury shares, were 8,415,799 and 8,377,220, respectively.
[3] | Under the Equity Compensation Plan, effective December 9, 2015, Artesian Resources Corporation authorized up to 331,500 shares of Class A Common Stock for issuance of grants in forms of stock options, stock units, dividend equivalents and other stock-based awards, subject to adjustment in certain circumstances as discussed in the Plan. Includes stock compensation expense for March 31, 2019 and March 31, 2018, see Note 1-Stock Compensation Plans.
[4] | At March 31, 2019, and March 31, 2018, Class B Common Stock had 1,040,000 shares authorized and 881,452 shares issued.

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