Condensed Consolidated Statements of Operations - USD ($) shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue:
Service revenue	$ 22,666,000	$ 38,862,000	$ 80,093,000	$ 119,101,000
Rental revenue	1,130,000	4,236,000	6,111,000	11,864,000
Total revenue	23,796,000	43,098,000	86,204,000	130,965,000
Costs and expenses:
Direct operating expenses	19,022,000	34,297,000	69,049,000	101,371,000
General and administrative expenses	4,084,000	4,774,000	13,453,000	15,529,000
Depreciation and amortization	6,821,000	8,928,000	21,966,000	27,340,000
Impairment of long-lived assets	0	120,000	15,579,000	237,000
Other, net	0	(4,000)	0	(10,000)
Total costs and expenses	29,927,000	48,115,000	120,047,000	144,467,000
Operating loss	(6,131,000)	(5,017,000)	(33,843,000)	(13,502,000)
Interest expense, net	(1,014,000)	(1,279,000)	(3,290,000)	(3,997,000)
Other income, net	20,000	280,000	200,000	457,000
Reorganization items, net	0	10,000	0	(200,000)
Loss before income taxes	(7,125,000)	(6,006,000)	(36,933,000)	(17,242,000)
Income tax expense	0	(46,000)	(15,000)	(171,000)
Net loss	$ (7,125,000)	$ (6,052,000)	$ (36,948,000)	$ (17,413,000)
Loss per common share:
Net loss per basic common share (usd per share)	$ (0.45)	$ (0.39)	$ (2.34)	$ (1.11)
Net loss per diluted common share (usd per share)	$ (0.45)	$ (0.39)	$ (2.34)	$ (1.11)
Weighted average shares outstanding:
Basic (in shares)	15,771	15,715	15,762	15,657
Diluted (in shares)	15,771	15,715	15,762	15,657