CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 16,699	$ 17,998	$ 16,827
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation and amortization	13,335	12,620	11,885
Amortization of debt expense	355	354	351
Provision for bad debt expense	92	68	(224)
Deferred income taxes, net	3,813	2,282	2,803
Stock compensation	254	152	193
AFUDC, equity portion	(1,243)	(894)	(556)
Changes in assets and liabilities, net of acquisitions:
Accounts and other receivables	807	(3,847)	318
Income tax receivable	(167)	602	(1,605)
Unbilled operating revenues	(348)	(141)	86
Materials and supplies	(1,281)	(2,769)	(398)
Income tax payable	(4)	6	(28)
Prepaid property taxes	(83)	697	(415)
Prepaid expenses and other	(419)	(216)	(444)
Other deferred assets	1,998	(5,473)	(445)
Regulatory assets	(497)	(37)	(236)
Regulatory liabilities	(3,168)	6,799	(535)
Accounts payable	284	(3,989)	3,547
Accrued expenses	614	(564)	(71)
Accrued interest	1,286	72	(13)
Revenue reserved for refund	0	0	0
Customer deposits and other	(476)	545	270
NET CASH PROVIDED BY OPERATING ACTIVITIES	31,851	24,265	31,310
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (net of AFUDC, equity portion)	(62,177)	(48,483)	(40,814)
Investment in acquisitions, net of cash acquired	0	(6,341)	0
Proceeds from sale of assets	99	65	90
NET CASH USED IN INVESTING ACTIVITIES	(62,078)	(54,759)	(40,724)
CASH FLOWS FROM FINANCING ACTIVITIES
Repayments under lines of credit agreements	(23,477)	(41,038)	(10,797)
Borrowings under lines of credit agreements	3,303	34,509	10,687
(Decrease) increase in overdraft payable	(34)	13	(75)
Proceeds from contributions in aid of construction and advances	24,747	17,494	17,059
Payouts for contributions in aid of construction and advances	(2,228)	(1,063)	(1,242)
Net proceeds from issuance of common stock	37,073	2,090	1,390
Equity issuance costs	(317)	0	0
Issuance of long-term debt	5,608	31,803	4,126
Dividends paid	(11,242)	(10,319)	(9,826)
Debt issuance costs	0	(135)	(19)
Principal repayments of long-term debt	(2,010)	(1,643)	(1,825)
NET CASH PROVIDED BY FINANCING ACTIVITIES	31,423	31,711	9,478
NET INCREASE IN CASH AND CASH EQUIVALENTS	1,196	1,217	64
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1,309	92	28
CASH AND CASH EQUIVALENTS AT END OF PERIOD	2,505	1,309	92
Non-cash Investing and Financing Activity:
Utility plant received as construction advances and contributions	3,492	8,416	3,538
Contractual amounts of contributions in aid of construction due from developers included in accounts receivable	1,695	726	545
Contractual amounts of contributions in aid of construction received from developers previously included in accounts receivable	799	356	1,749
Change in amounts included in accounts payable and accrued payables related to capital expenditures	(3,384)	3,182	641
Supplemental Disclosures of Cash Flow Information:
Interest paid	7,515	8,430	7,605
Income taxes paid	3,590	3,482	5,181
Purchase price of allocation of investment in acquisitions:
Utility plant	0	33,345	0
Cash	0	280	0
Goodwill	0	1,939	0
Other assets	0	1,033	0
Total assets	0	36,597	0
Less:
Liabilities	0	2,828	0
Future contractual obligation payable to seller	0	1,569	0
Contributions in aid of construction	0	25,597	0
Cash paid for acquisitions	0	6,621	0
Cash received from acquisitions	0	280	0
Investment in acquisitions, net of cash acquired	$ 0	$ 6,341	$ 0