CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended		64 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2018	Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 2,224	$ 3,103
Adjustments to reconcile net income to net cash provided by operating activities:
Deferred compensation	2,051	1,714
Depreciation and amortization	8,353	7,469
Amortization of deferred debt issuance costs and discounts	88	101
Gain on sale of Loop 303 contracts	1,000	0
Loss on equity investment	79	265
Other gains (loss)	5	(27)
Provision for doubtful accounts receivable	50	93
Deferred income tax expense	570	1,236
Changes in assets and liabilities
Accounts receivable	(193)	178
Other current assets	(60)	(110)
Accounts payable and other current liabilities	(1,584)	(688)
Other noncurrent assets	75	73
Other noncurrent liabilities	908	(2,100)
Net cash provided by operating activities	11,566	11,307
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(11,187)	(4,787)
Payments for (Proceeds from) Previous Acquisition	0	(8,475)
Cash received from the sale of Loop 303 contracts	1,000	0	$ 3,100
Other cash flows from investing activities	131	(58)
Net cash used in investing activities	(10,056)	(13,320)
CASH FLOWS FROM FINANCING ACTIVITIES:
Dividends paid	(6,165)	(5,791)
Advances in aid of construction	1,199	817
Refunds of advances for construction	952	896
Proceeds from stock option exercise	414	790
Principal payments under capital lease	(64)	(27)
Loan borrowings	35	140
Loan repayments	(39)	(9)
Proceeds from sale of stock	0	15,910
Debt issuance costs paid	(40)	(134)
Payments of offering costs for sale of stock	0	(1,274)
Net cash provided by (used in) financing activities	(5,612)	9,526
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH — Beginning of period	12,756
CASH, CASH EQUIVALENTS, AND RESTRICTED CASH – End of period	7,513	12,756	12,756
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	9,095	13,197	13,197	$ 5,684
Cash Equivalents, at Carrying Value	7,513	12,756	12,756
Restricted Cash and Cash Equivalents, Current	1,582	441	441
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	9,095	13,197	$ 13,197	$ 5,684
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	$ (4,102)	$ 7,513