Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 3,074	$ 3,790
Adjustments to reconcile net income to cash flows provided by operating activities:
Depreciation	3,571	3,843
Amortization	518	670
Amortization of loan costs	609	447
Loss on extinguishment of debt	155
Provision for uncollectible accounts receivable	119	175
Stock-based compensation	199	211
PIK interest added to principal	115
Changes in operating assets and liabilities
Accounts receivable	115	(1)
Material and supplies	(173)	(221)
Prepaid expenses and other assets	1,246	2,076
Accounts payable and accrued expenses	217	905
Advance billings and payments	(67)	(27)
Other liabilities	(14)	(13)
Net cash from operating activities	9,684	11,855
Cash flows used in investing activities:
Acquisition and construction of property and equipment	(2,215)	(3,013)
Net cash used in investing activities	(2,215)	(3,013)
Cash flows used in financing activities:
Loan origination costs	(5,215)	(15)
Principal repayment of long-term notes payable	(101,053)	(7,046)
Proceeds from loan refinancing	100,300
Tax withholdings paid on behalf of employees for restricted stock units	(109)
Net cash used in financing activities	(6,077)	(7,061)
Net increase in cash and cash equivalents	1,392	1,781
Cash and cash equivalents, beginning of period	6,884	5,082
Cash and cash equivalents, end of period	8,276	6,863
Supplemental disclosures of cash flow information:
Interest paid	3,728	3,591
Income taxes paid	685	11
Conversion of Class B common stock to Class A common stock	2
Issuance of Class A common stock	$ 1