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Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income $ 3,859 $ 3,705
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 2,480 2,174
Stock-based compensation 45 28
Decrease in deferred income taxes (230) (108)
Other 15 29
Changes in assets and liabilities:    
(Increase) decrease in accounts receivable and unbilled revenues (161) 1,038
(Increase) decrease in recoverable income taxes (1) 139
Increase in materials and supplies, prepaid expenses, prepaid pension cost, regulatory and other assets (3,242) (2,201)
Increase in accounts payable, accrued compensation and benefits, accrued expenses, deferred employee benefits, regulatory liabilities, and other deferred credits 2,456 1,684
Increase in accrued interest 112 109
Net cash provided by operating activities 5,333 6,597
CASH FLOWS FROM INVESTING ACTIVITIES:    
Utility plant additions, including debt portion of allowance for funds used during construction of $165 in 2022 and $146 in 2021 (7,504) (7,431)
Net cash used in investing activities (7,504) (7,431)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Customers' advances for construction and contributions in aid of construction 676 792
Repayments of customer advances (337) (137)
Proceeds of long-term debt issues 13,375 11,648
Repayments of long-term debt (8,289) (13,178)
Changes in cash overdraft position (1,153) (1,263)
Issuance of common stock 450 473
Dividends paid (2,551) (2,448)
Net cash provided by (used in) financing activities 2,171 (4,113)
Net change in cash, cash equivalents, and restricted cash 0 (4,947)
Cash, cash equivalents, and restricted cash at beginning of period 1 5,002
Cash and cash equivalents at end of period 1 55
Cash paid during the period for:    
Interest, net of amounts capitalized 964 912
Income taxes $ 0 $ 0
Supplemental schedule of non-cash investing and financing activities:    
Accounts payable includes $3,715 in 2022 and $3,831 in 2021 for the construction of utility plant.