CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues
Total Operating Revenues	$ 24,737	$ 22,549	$ 66,390	$ 62,586
Operating expenses
Utility operating expenses	10,947	10,495	29,541	28,865
Non-utility operating expenses	926	838	2,387	2,385
Depreciation and amortization	2,835	2,679	8,280	8,117
State and federal income taxes	1,784	1,498	4,680	4,002
Property and other taxes	1,376	1,309	4,048	3,884
Total Operating Expenses	17,868	16,819	48,936	47,253
Operating income	6,869	5,730	17,454	15,333
Other income, net
Allowance for funds used during construction (AFUDC)	155	566	917	1,058
Miscellaneous (expense) income	(53)	(73)	1,022	670
Income before interest charges	6,971	6,223	19,393	17,061
Interest charges	1,908	1,765	5,690	5,235
Net income applicable to common stock	$ 5,063	$ 4,458	$ 13,703	$ 11,826
Income per common share:
Basic (in dollars per share)	$ 0.54	$ 0.48	$ 1.47	$ 1.28
Diluted (in dollars per share)	$ 0.54	$ 0.48	$ 1.46	$ 1.27
Weighted average common shares outstanding:
Basic (in shares)	9,338	9,283	9,320	9,272
Diluted (in shares)	9,377	9,329	9,363	9,322
Cash dividends per share of common stock (in dollars per share)	$ 0.2496	$ 0.2459	$ 0.7488	$ 0.7341
Water Sales [Member]
Operating revenues
Total Operating Revenues	$ 21,362	$ 20,102	$ 58,178	$ 55,227
Other Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenues	2,080	1,245	4,416	3,515
Non-Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenues	$ 1,295	$ 1,202	$ 3,796	$ 3,844