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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, 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] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 14,278,000 | 14,278,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (8,819,000) | (8,819,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 10,000 |  |  |  | 356,000 |  | $ 366,000
Dividend reinvestment plan (in shares) |  | 10,000 | [1],[2],[3] |  |  |  |  | 10,000
Employee stock options and awards | [3] | $ 13,000 |  |  |  | 306,000 |  | $ 319,000
Employee stock options and awards (in shares) | [1],[2],[3] | 13,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 12,000 |  |  |  | 451,000 |  | 463,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 12,000 |  |  |  |  |  |
Balance at Dec. 31, 2018 |  | $ 8,368,000 |  | $ 882,000 |  | 100,639,000 | 43,362,000 | 153,251,000
Balance (in shares) at Dec. 31, 2018 |  | 8,368,000 | [1],[2],[3] | 882,000 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 14,925,000 | 14,925,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (9,122,000) | (9,122,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 11,000 |  |  |  | 389,000 |  | $ 400,000
Dividend reinvestment plan (in shares) |  | 11,000 | [1],[2],[3] |  |  |  |  | 11,000
Employee stock options and awards | [3] | $ 21,000 |  |  |  | 426,000 |  | $ 447,000
Employee stock options and awards (in shares) | [1],[2],[3] | 21,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 10,000 |  |  |  | 357,000 |  | 367,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 10,000 |  |  |  |  |  |
Balance at Dec. 31, 2019 |  | $ 8,410,000 |  | $ 882,000 |  | 101,811,000 | 49,165,000 | 160,268,000
Balance (in shares) at Dec. 31, 2019 |  | 8,410,000 | [1],[2],[3] | 882,000 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  | 16,817,000 | 16,817,000
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  |  |  |  |  |  | (9,376,000) | (9,376,000)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 11,000 |  |  |  | 377,000 |  | $ 388,000
Dividend reinvestment plan (in shares) |  | 11,000 | [1],[2],[3] |  |  |  |  | 11,000
Employee stock options and awards | [3] | $ 42,000 |  |  |  | 832,000 |  | $ 874,000
Employee stock options and awards (in shares) | [1],[2],[3] | 42,000 |  |  |  |  |  |
Employee Retirement Plan | [1] | $ 12,000 |  |  |  | 443,000 |  | 455,000
Employee Retirement Plan (in shares) | [1],[2],[3] | 12,000 |  |  |  |  |  |
Balance at Dec. 31, 2020 |  | $ 8,475,000 |  | $ 882,000 |  | $ 103,463,000 | $ 56,606,000 | $ 169,426,000
Balance (in shares) at Dec. 31, 2020 |  | 8,475,000 | [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, 2020, 2019, and 2018, Class A Common Stock had 15,000,000 shares authorized. For the same periods, shares issued, inclusive of treasury shares, were 8,504,429, 8,439,223 and 8,398,005, 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, 2020, 2019, and 2018, see Note 1-Stock Compensation Plans.
[4] | At December 31, 2020, 2019, and 2018, Class B Common Stock had 1,040,000 shares authorized and 882,000 shares issued.

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