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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES      
Net income $ 14,278 $ 13,983 $ 12,954
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 10,288 9,555 9,188
Deferred income taxes, net 899 8,206 5,464
Stock compensation 192 423 92
AFUDC, equity portion (427) (227) (146)
Changes in assets and liabilities:      
Accounts receivable, net of allowance for doubtful accounts (87) (187) (292)
Income tax receivable 1,581 (2,203) 1,278
Unbilled operating revenues (14) (24) 132
Materials and supplies 60 45 149
Prepaid property taxes (75) (126) (78)
Prepaid expenses and other (82) (215) (209)
Other deferred assets (245) (172) (175)
Regulatory assets 417 405 734
Regulatory liabilities (388) (37) (81)
Accounts payable (666) 3,321 618
Accrued expenses 1,014 1,579 55
Accrued interest (1,021) 805 (32)
Revenue reserved for refund 3,298 0 0
Customer deposits and other, net 119 648 128
NET CASH PROVIDED BY OPERATING ACTIVITIES 29,141 35,779 29,779
CASH FLOWS FROM INVESTING ACTIVITIES      
Capital expenditures (net of AFUDC, equity portion) (49,053) (41,094) (28,251)
Proceeds from sale of assets 49 87 96
NET CASH USED IN INVESTING ACTIVITIES (49,004) (41,007) (28,155)
CASH FLOWS FROM FINANCING ACTIVITIES      
Net borrowings (repayments) under lines of credit agreements 6,332 2,480 (3,357)
(Decrease) increase in overdraft payable (187) 272 (514)
Net advances and contributions in aid of construction 10,461 11,353 9,907
Net proceeds from issuance of common stock 956 1,711 1,826
Issuance of long-term debt 12,000 0 0
Dividends paid (8,819) (8,496) (8,180)
Debt issuance costs (195) (148) 0
Principal repayments of long-term debt (1,344) (1,218) (1,289)
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES 19,204 5,954 (1,607)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS (659) 726 17
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR 952 226 209
CASH AND CASH EQUIVALENTS AT END OF YEAR 293 952 226
Supplemental Disclosures of Cash Flow Information:      
Utility plant received as construction advances and contributions in aid of construction 1,153 5,662 2,499
Contractual amounts of contributions in aid of construction due from developers included in accounts receivable 2,156 2,910 1,542
Contractual amounts of contributions in aid of construction received from developers previously included in accounts receivable 2,981 1,995 388
Supplemental Disclosures of Cash Flow Information:      
Interest paid 7,273 5,372 6,676
Income taxes paid $ 3,287 $ 1,281 $ 1,434