UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Statement [Abstract]
Net revenue	$ 178,956	$ 168,584
Cost of revenue (excluding depreciation expense)	121,292	113,536
Gross profit	57,664	55,048
Operating expenses:
Service location operating expenses	40,187	39,299
General and administrative expenses	11,493	10,669
Depreciation and amortization expense	5,073	6,486
Restructuring, acquisition, integration, and other expenses	6,021	1,882
Total operating expenses	62,774	58,336
Operating loss	(5,110)	(3,288)
Other expense:
Interest expense, net	15,231	13,395
Change in fair value of equity linked liabilities	(9,999)	(3,439)
Gain on dispositions	(76)	(305)
Total other expense	5,156	9,651
Loss from continuing operations before income taxes	(10,266)	(12,939)
Income tax expense	(16)	(48)
Loss from continuing operations	(10,282)	(12,987)
Loss from discontinued operations, net of income taxes	0	(30)
Net loss	(10,282)	(13,017)
Accrued dividends on preferred stock	(2,957)	(2,657)
Loss attributable to common stockholders	$ (13,239)	$ (15,674)
Basic loss per share:
Loss from continuing operations (in dollars per share)	$ (0.10)	$ (0.12)
Loss from discontinued operations (in dollars per share)	0.00	0.00
Basic loss per share (in dollars per share)	(0.10)	(0.12)
Diluted loss per share:
Loss from continuing operations (in dollars per share)	(0.18)	(0.15)
Loss from discontinued operations (in dollars per share)	0.00	0.00
Diluted loss per share (in dollars per share)	$ (0.18)	$ (0.15)
Weighted average number of common shares outstanding:
Basic (in shares)	128,108	127,772
Diluted (in shares)	131,358	130,437