Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statements of Income (Unaudited) [Abstract]
OPERATING REVENUES	$ 12,877	$ 11,831
OPERATING EXPENSES:
Operation and maintenance	2,663	2,407
Administrative and general	2,244	1,906
Depreciation and amortization	2,024	1,891
Taxes other than income taxes	330	341
Operating expenses	7,261	6,545
Operating income	5,616	5,286
OTHER INCOME (EXPENSES):
Interest on debt	(1,195)	(1,327)
Allowance for funds used during construction	101	69
Other pension costs	(341)	(363)
Gain on life insurance	515	0
Other income (expenses), net	(125)	(151)
Other income (expenses)	(1,045)	(1,772)
Income before income taxes	4,571	3,514
Income taxes	569	701
Net Income	$ 4,002	$ 2,813
Basic Earnings Per Share (in dollars per share)	$ 0.31	$ 0.22
Diluted Earnings Per Share (in dollars per share)	$ 0.31	$ 0.22