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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) | 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, 2014 |  | $ 8,030,000 |  | $ 882,000 |  | $ 92,545,000 | $ 24,148,000 | $ 125,605,000
Balance (in shares) at Dec. 31, 2014 |  | 8,030,000 | [1],[2],[3] | 882,000 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 11,305,000 | 11,305,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (7,811,000) | (7,811,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 18,000 |  |  |  | 366,000 |  | $ 384,000
Dividends reinvestment plan (in shares) |  | 18,000 | [1],[2],[3] |  |  |  |  | 18,000
Employee stock options and awards |  | $ 111,000 |  |  |  | 2,419,000 |  | $ 2,530,000
Employee stock options and awards (in shares) | [1],[2],[3] | 111,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 17,000 |  |  |  | 301,000 |  | 318,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 17,000 |  |  |  |  |  |
Balance at Dec. 31, 2015 |  | $ 8,176,000 |  | $ 882,000 |  | 95,631,000 | 27,642,000 | 132,331,000
Balance (in shares) at Dec. 31, 2015 |  | 8,176,000 | [1],[2],[3] | 882,000 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 12,954,000 | 12,954,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (8,180,000) | (8,180,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 13,000 |  |  |  | 387,000 |  | $ 400,000
Dividends reinvestment plan (in shares) |  | 13,000 | [1],[2],[3] |  |  |  |  | 13,000
Employee stock options and awards |  | $ 38,000 |  |  |  | 939,000 |  | $ 977,000
Employee stock options and awards (in shares) | [1],[2],[3] | 38,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 18,000 |  |  |  | 523,000 |  | 541,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 18,000 |  |  |  |  |  |
Balance at Dec. 31, 2016 |  | $ 8,245,000 |  | $ 882,000 |  | 97,480,000 | 32,416,000 | 139,023,000
Balance (in shares) at Dec. 31, 2016 |  | 8,245,000 | [1],[2],[3] | 882,000 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 13,983,000 | 13,983,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (8,496,000) | (8,496,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 11,000 |  |  |  | 378,000 |  | $ 389,000
Dividends reinvestment plan (in shares) |  | 11,000 | [1],[2],[3] |  |  |  |  | 11,000
Employee stock options and awards |  | $ 67,000 |  |  |  | 1,313,000 |  | $ 1,380,000
Employee stock options and awards (in shares) | [1],[2],[3] | 67,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 10,000 |  |  |  | 355,000 |  | 365,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 10,000 |  |  |  |  |  |
Balance at Dec. 31, 2017 |  | $ 8,333,000 |  | $ 882,000 |  | $ 99,526,000 | $ 37,903,000 | $ 146,644,000
Balance (in shares) at Dec. 31, 2017 |  | 8,333,000 | [1],[2],[3] | 882,000 | [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 December 31, 2017, 2016, and 2015, Class A Common Stock had 15,000,000 shares authorized. For the same periods, shares issued, inclusive of treasury shares, were 8,362,431, 8,275,010 and 8,205,190, 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 the years ended December 31, 2017, 2016, and 2015, see Note 1-Stock Compensation Plans.
[4] | At December 31, 2017, 2016, and 2015, Class B Common Stock had 1,040,000 shares authorized and 882,000 shares issued.

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