Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue:
Service revenue	$ 22,956,000	$ 41,238,000	$ 57,427,000	$ 80,239,000
Rental revenue	1,510,000	4,002,000	4,981,000	7,628,000
Total revenue	24,466,000	45,240,000	62,408,000	87,867,000
Costs and expenses:
Direct operating expenses	18,551,000	34,517,000	50,027,000	67,074,000
General and administrative expenses	4,445,000	5,280,000	9,369,000	10,755,000
Depreciation and amortization	7,156,000	9,277,000	15,145,000	18,412,000
Impairment of long-lived assets	0	0	15,579,000	117,000
Other, net	0	(6,000)	0	(6,000)
Total costs and expenses	30,152,000	49,068,000	90,120,000	96,352,000
Operating loss	(5,686,000)	(3,828,000)	(27,712,000)	(8,485,000)
Interest expense, net	(1,116,000)	(1,297,000)	(2,276,000)	(2,718,000)
Other income, net	38,000	152,000	180,000	177,000
Reorganization items, net	0	13,000	0	(210,000)
Loss before income taxes	(6,764,000)	(4,960,000)	(29,808,000)	(11,236,000)
Income tax expense	(15,000)	(46,000)	(15,000)	(125,000)
Net loss	$ (6,779,000)	$ (5,006,000)	$ (29,823,000)	$ (11,361,000)
Loss per common share:
Net loss per basic common share (usd per share)	$ (0.43)	$ (0.32)	$ (1.89)	$ (0.73)
Net loss per diluted common share (usd per share)	$ (0.43)	$ (0.32)	$ (1.89)	$ (0.73)
Weighted average shares outstanding:
Basic (in shares)	15,761	15,704	15,757	15,627
Diluted (in shares)	15,761	15,704	15,757	15,627