CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating revenues
Total Operating Revenue	$ 19,386	$ 18,906
Operating expenses
Utility operating expenses	9,121	9,083
Non-utility operating expenses	767	663
Depreciation and amortization	2,715	2,568
State and federal income taxes	1,180	1,339
Property and other taxes	1,319	1,282
Total Operating Expenses	15,102	14,935
Operating income	4,284	3,971
Other income, net
Allowance for funds used during construction (AFUDC)	226	88
Miscellaneous income	800	918
Income before interest charges	5,310	4,977
Interest charges	1,720	1,499
Net income applicable to common stock	$ 3,590	$ 3,478
Income per common share:
Basic (in dollars per share)	$ 0.39	$ 0.38
Diluted (in dollars per share)	$ 0.39	$ 0.37
Weighted average common shares outstanding:
Basic (in shares)	9,258	9,223
Diluted (in shares)	9,314	9,281
Cash dividends per share of common stock (in dollars per share)	$ 0.2423	$ 0.2352
Water Sales [Member]
Operating revenues
Total Operating Revenue	$ 16,934	$ 16,645
Other Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenue	1,120	999
Non-Utility Operating Revenue [Member]
Operating revenues
Total Operating Revenue	$ 1,332	$ 1,262