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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, 2019 |  | $ 8,410 |  | $ 882 |  | $ 101,811 | $ 49,165 | $ 160,268
Balance (in shares) at Dec. 31, 2019 |  | 8,410 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 4,074 | 4,074
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,319) | (2,319)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 3 |  | $ 0 |  | 105 | 0 | 108
Dividend reinvestment plan (in shares) |  | 3 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 5 |  | $ 0 |  | 129 | 0 | 134
Employee stock options and awards (in shares) | [3] | 5 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 2 |  | $ 0 |  | 87 | 0 | 89
Employee Retirement Plan (in shares) | [1] | 2 | [2],[3] | 0 | [4] |  |  |
Balance at Mar. 31, 2020 |  | $ 8,420 |  | $ 882 |  | 102,132 | 50,920 | 162,354
Balance (in shares) at Mar. 31, 2020 |  | 8,420 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Dec. 31, 2019 |  | $ 8,410 |  | $ 882 |  | 101,811 | 49,165 | 160,268
Balance (in shares) at Dec. 31, 2019 |  | 8,410 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  | 13,703
Balance at Sep. 30, 2020 |  | $ 8,458 |  | $ 882 |  | 103,022 | 53,492 | 165,854
Balance (in shares) at Sep. 30, 2020 |  | 8,458 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Mar. 31, 2020 |  | $ 8,420 |  | $ 882 |  | 102,132 | 50,920 | 162,354
Balance (in shares) at Mar. 31, 2020 |  | 8,420 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 4,566 | 4,566
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (4,655) | (4,655)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 3 |  | $ 0 |  | 87 | 0 | 90
Dividend reinvestment plan (in shares) |  | 3 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 24 |  | $ 0 |  | 399 | 0 | 423
Employee stock options and awards (in shares) | [3] | 24 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 4 |  | $ 0 |  | 128 | 0 | 132
Employee Retirement Plan (in shares) | [1] | 4 | [2],[3] | 0 | [4] |  |  |
Balance at Jun. 30, 2020 |  | $ 8,451 |  | $ 882 |  | 102,746 | 50,831 | 162,910
Balance (in shares) at Jun. 30, 2020 |  | 8,451 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 5,063 | 5,063
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,402) | (2,402)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 2 |  | $ 0 |  | 88 | 0 | 90
Dividend reinvestment plan (in shares) |  | 2 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 1 |  | $ 0 |  | 45 | 0 | 46
Employee stock options and awards (in shares) | [3] | 1 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 4 |  | $ 0 |  | 143 | 0 | 147
Employee Retirement Plan (in shares) | [1] | 4 | [2],[3] | 0 | [4] |  |  |
Balance at Sep. 30, 2020 |  | $ 8,458 |  | $ 882 |  | 103,022 | 53,492 | 165,854
Balance (in shares) at Sep. 30, 2020 |  | 8,458 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Dec. 31, 2020 |  | $ 8,475 |  | $ 882 |  | 103,463 | 56,606 | 169,426
Balance (in shares) at Dec. 31, 2020 |  | 8,475 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 4,206 | 4,206
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,406) | (2,406)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 3 |  | $ 0 |  | 95 | 0 | 98
Dividend reinvestment plan (in shares) |  | 3 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 22 |  | $ 0 |  | 438 | 0 | 460
Employee stock options and awards (in shares) | [3] | 22 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 2 |  | $ 0 |  | 84 | 0 | 86
Employee Retirement Plan (in shares) | [1] | 2 | [2],[3] | 0 | [4] |  |  |
Balance at Mar. 31, 2021 |  | $ 8,502 |  | $ 882 |  | 104,080 | 58,406 | 171,870
Balance (in shares) at Mar. 31, 2021 |  | 8,502 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Dec. 31, 2020 |  | $ 8,475 |  | $ 882 |  | 103,463 | 56,606 | 169,426
Balance (in shares) at Dec. 31, 2020 |  | 8,475 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  |  |  |  |  |  |  | 13,767
Balance at Sep. 30, 2021 |  | $ 8,524 |  | $ 882 |  | 104,689 | 60,547 | 174,642
Balance (in shares) at Sep. 30, 2021 |  | 8,524 | [1],[2],[3] | 882 | [4] |  |  |
Balance at Mar. 31, 2021 |  | $ 8,502 |  | $ 882 |  | 104,080 | 58,406 | 171,870
Balance (in shares) at Mar. 31, 2021 |  | 8,502 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 4,505 | 4,505
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (4,904) | (4,904)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 2 |  | $ 0 |  | 103 | 0 | 105
Dividend reinvestment plan (in shares) |  | 2 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 11 |  | $ 0 |  | 165 | 0 | 176
Employee stock options and awards (in shares) | [3] | 11 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 3 |  | $ 0 |  | 105 | 0 | 108
Employee Retirement Plan (in shares) | [1] | 3 | [2],[3] | 0 | [4] |  |  |
Balance at Jun. 30, 2021 |  | $ 8,518 |  | $ 882 |  | 104,453 | 58,007 | 171,860
Balance (in shares) at Jun. 30, 2021 |  | 8,518 | [1],[2],[3] | 882 | [4] |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income |  | $ 0 |  | $ 0 |  | 0 | 5,056 | 5,056
Cash dividends declared |  |  |  |  |  |  |  |
Common stock |  | 0 |  | 0 |  | 0 | (2,516) | (2,516)
Issuance of common stock |  |  |  |  |  |  |  |
Dividend reinvestment plan |  | $ 3 |  | $ 0 |  | 94 | 0 | 97
Dividend reinvestment plan (in shares) |  | 3 | [1],[2],[3] | 0 | [4] |  |  |
Employee stock options and awards | [3] | $ 1 |  | $ 0 |  | 49 | 0 | 50
Employee stock options and awards (in shares) | [3] | 1 | [1],[2] | 0 | [4] |  |  |
Employee Retirement Plan | [1] | $ 2 |  | $ 0 |  | 93 | 0 | 95
Employee Retirement Plan (in shares) | [1] | 2 | [2],[3] | 0 | [4] |  |  |
Balance at Sep. 30, 2021 |  | $ 8,524 |  | $ 882 |  | $ 104,689 | $ 60,547 | $ 174,642
Balance (in shares) at Sep. 30, 2021 |  | 8,524 | [1],[2],[3] | 882 | [4] |  |  |
[1] | Artesian Resources Corporation registered 200,000 shares of Class A Common Stock, subsequently adjusted for stock splits, available for purchase through the Artesian Retirement Plan and the Artesian Supplemental Retirement Plan.
[2] | At September 30, 2021 and September 30, 2020, Class A Common Stock had 15,000,000 shares authorized. For the same periods, shares issued, inclusive of treasury shares, were 8,553,070 and 8,487,604, respectively.
[3] | Under the Equity Compensation Plan, effective December 9, 2015, or the 2015 Plan, Artesian Resources Corporation authorized up to 331,500 shares of Class A Common Stock for issuance of grants in the form of stock options, stock units, dividend equivalents and other stock-based awards, subject to adjustment in certain circumstances as discussed in the 2015 Plan. Includes stock compensation expense for September 30, 2021, and September 30, 2020, see Note 5-Stock Compensation Plans.
[4] | At September 30, 2021 and September 30, 2020, Class B Common Stock had 1,040,000 shares authorized and 881,452 shares issued.

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