CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 14,925	$ 14,278	$ 13,983
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	10,803	10,288	9,555
Deferred income taxes, net	(2,813)	899	8,206
Stock compensation	181	192	423
AFUDC, equity portion	(886)	(427)	(227)
Changes in assets and liabilities:
Accounts receivable, net of allowance for doubtful accounts	(94)	(87)	(187)
Income tax receivable	753	1,581	(2,203)
Unbilled operating revenues	230	(14)	(24)
Materials and supplies	195	60	45
Income taxes payable	343	0	0
Prepaid property taxes	(84)	(75)	(126)
Prepaid expenses and other	(126)	(82)	(215)
Other deferred assets	(361)	(245)	(172)
Regulatory assets	388	417	405
Regulatory liabilities	(642)	(388)	(37)
Accounts payable	(11)	(666)	3,321
Accrued expenses	(789)	1,014	1,579
Accrued interest	46	(1,021)	805
Revenue reserved for refund	(3,298)	3,298	0
Customer deposits and other	110	119	648
NET CASH PROVIDED BY OPERATING ACTIVITIES	18,870	29,141	35,779
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (net of AFUDC, equity portion)	(40,677)	(49,053)	(41,094)
Proceeds from sale of assets	51	49	87
NET CASH USED IN INVESTING ACTIVITIES	(40,626)	(49,004)	(41,007)
CASH FLOWS FROM FINANCING ACTIVITIES
Net (repayments) borrowings under lines of credit agreements	(8,442)	6,332	2,480
(Decrease) increase in overdraft payable	(102)	(187)	272
Net advances and contributions in aid of construction	10,507	10,461	11,353
Net proceeds from issuance of common stock	1,033	956	1,711
Issuance of long-term debt	30,000	12,000	0
Dividends paid	(9,122)	(8,819)	(8,496)
Debt issuance costs	(90)	(195)	(148)
Principal repayments of long-term debt	(1,725)	(1,344)	(1,218)
NET CASH PROVIDED BY FINANCING ACTIVITIES	22,059	19,204	5,954
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	303	(659)	726
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	293	952	226
CASH AND CASH EQUIVALENTS AT END OF PERIOD	596	293	952
Non-cash Investing and Financing Activity:
Utility plant received as construction advances and contributions	3,716	1,153	5,662
Contractual amounts of contributions in aid of construction due from developers included in accounts receivable	710	2,156	2,910
Contractual amounts of contributions in aid of construction received from developers previously included in accounts receivable	2,050	2,981	1,995
Supplemental Disclosures of Cash Flow Information:
Interest paid	6,978	7,273	5,372
Income taxes paid	$ 7,332	$ 3,287	$ 1,281