Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 3,790	$ 2,702
Adjustments to reconcile net income to cash flows provided by operating activities:
Depreciation	3,843	4,681
Amortization	670	911
Amortization of loan costs	447	475
Provision for uncollectible accounts receivable	175	227
Stock-based compensation	211	241
Changes in operating assets and liabilities:
Accounts receivable	(1)	(238)
Material and supplies	(221)	12
Prepaid expenses and other assets	2,076	312
Accounts payable and accrued expenses	905	556
Advance billings and payments	(27)	(34)
Other liabilities	(13)	(26)
Net cash from operating activities	11,855	9,819
Cash flows used in investing activities:
Acquisition and construction of property and equipment	$ (3,013)	(2,913)
Proceeds from sale of property and equipment		58
Purchase of Reliable Networks, net of cash acquired		(500)
Net cash used in investing activities	$ (3,013)	(3,355)
Cash flows used in financing activities:
Principal repayment of long-term notes payable	(7,046)	$ (11,573)
Loan origination costs	(15)
Net cash used in financing activities	(7,061)	$ (11,573)
Net increase (decrease) in cash and cash equivalents	1,781	(5,109)
Cash and cash equivalents, beginning of period	5,082	9,916
Cash and cash equivalents, end of period	6,863	4,807
Supplemental disclosures of cash flow information:
Interest paid	3,591	4,093
Income taxes paid	$ 11	$ 616