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
Dividend 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, 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								7,404
Balance at Jun. 30, 2018		$ 8,359		$ 882		100,208	38,728	148,177
Balance (in shares) at Jun. 30, 2018		8,359	[1],[2],[3]	882	[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]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 0		$ 0		0	3,926	3,926
Cash dividends declared
Common stock		0		0		0	(4,411)	(4,411)
Issuance of common stock
Dividend reinvestment plan		$ 2		$ 0		91	0	93
Dividend reinvestment plan (in shares)		2	[1],[2],[3]	0	[4]
Employee stock options and awards	[3]	$ 6		$ 0		67	0	73
Employee stock options and awards (in shares)	[3]	6	[1],[2]	0	[4]
Employee Retirement Plan	[1]	$ 3		$ 0		99	0	102
Employee Retirement Plan (in shares)	[1]	3	[2],[3]	0	[4]
Balance at Jun. 30, 2018		$ 8,359		$ 882		100,208	38,728	148,177
Balance (in shares) at Jun. 30, 2018		8,359	[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	[3]	$ 2		$ 0		85	0	87
Dividend reinvestment plan (in shares)	[3]	2	[1],[2]	0	[4]
Employee stock options and awards	[1],[3]	$ 14		$ 0		263	0	277
Employee stock options and awards (in shares)	[1],[3]	14	[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]
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								7,368
Balance at Jun. 30, 2019		$ 8,397		$ 882		101,298	43,926	154,503
Balance (in shares) at Jun. 30, 2019		8,397	[1],[2],[3]	882	[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]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		$ 0		$ 0		0	3,778	3,778
Cash dividends declared
Common stock		0		0		0	(4,563)	(4,563)
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]	$ 5		$ 0		38	0	43
Employee stock options and awards (in shares)	[3]	5	[1],[2]	0	[4]
Employee Retirement Plan	[1]	$ 3		$ 0		110	0	113
Employee Retirement Plan (in shares)	[1]	3	[2],[3]	0	[4]
Balance at Jun. 30, 2019		$ 8,397		$ 882		$ 101,298	$ 43,926	$ 154,503
Balance (in shares) at Jun. 30, 2019		8,397	[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 June 30, 2019, and June 30, 2018, Class A Common Stock had 15,000,000 shares authorized. For the same periods, shares issued, inclusive of treasury shares, were 8,426,291 and 8,388,715, 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 2015 Plan. Includes stock compensation expense for June 30, 2019 and June 30, 2018, see Note 5-Stock Compensation Plans.

[4] At June 30, 2019, and June 30, 2018, Class B Common Stock had 1,040,000 shares authorized and 881,452 shares issued.