Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income (loss)	$ 3,298	$ (15,357)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Dividends on Series B preferred stock classified as interest expense	7,301	7,300
Gain on the disposal of assets, net of disposal costs	(12,541)	(12,827)
Gain on insurance proceeds received for damage to equipment	(180)
Impairment charges	483
Stock-based compensation	39	136
Depreciation and amortization	2,906	3,330
Net barter (income) loss	(86)	26
Provision for trade doubtful accounts	268	466
Amortization of deferred financing costs		1,138
Amortization of original issued discount		629
Deferred income taxes	961	6,195
Unearned revenue	192	(492)
Changes in operating assets and liabilities:
Trade receivables	2,906	2,995
Prepaid expenses and other current assets	(1,809)	(1,685)
Other assets	(304)	(329)
Accounts payable and accrued expenses	473	2,508
Accrued interest	(304)	(5,493)
Other liabilities	164	341
Net cash provided by (used in) operating activities	3,767	(11,119)
Cash flows from investing activities:
Purchases of property and equipment	(1,746)	(905)
Advance of spectrum sale proceeds		5,502
Proceeds from the sale of property and equipment	12,950	13,861
Insurance proceeds received for damage to equipment	297
Net cash provided by investing activities	11,501	18,458
Cash flows from financing activities:
Payments of other debt		(4,605)
Net cash used in financing activities	(10,410)	(19,331)
Net increase (decrease) in cash and cash equivalents	4,858	(11,992)
Cash and cash equivalents at beginning of period	16,141	23,835
Cash and cash equivalents at end of period	20,999	11,843
Supplemental cash flows information:
Interest paid	24,336	31,434
Income tax paid	1,197	28
Noncash investing and financing activities:
Unrealized gain on derivative instrument		102
12.5% Senior Secured Notes
Cash flows from financing activities:
Paydown of 12.5% senior secured notes	$ (10,410)	$ (14,726)