CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE LOSS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net revenues	$ 291,505	$ 316,158	$ 280,718
Operating costs and expenses:
Costs of sales and services, exclusive of depreciation and amortization	106,946	107,649	106,217
Costs of customer support	32,111	32,517	25,757
Sales, general and administrative	67,050	75,023	62,728
Depreciation and amortization	85,713	88,416	73,429
Goodwill and intangibles impairment	59,126	0	0
Exit activities, restructuring and impairments	8,986	5,406	6,249
Total operating costs and expenses	359,932	309,011	274,380
(Loss) income from operations	(68,427)	7,147	6,338
Interest expense	75,142	67,823	50,933
Gain on sale of business	(4,196)	0	0
Loss (gain) on foreign currency, net	444	(258)	525
Total non-operating expenses	71,390	67,565	51,458
Loss before income taxes and equity in earnings of equity-method investment	(139,817)	(60,418)	(45,120)
Income tax (benefit) expense	(1,648)	657	253
Equity in earnings of equity-method investment, net of taxes	0	0	(1,207)
Net loss	(138,169)	(61,075)	(44,166)
Less net income attributable to non-controlling interest	81	125	70
Net loss attributable to shareholders	(138,250)	(61,200)	(44,236)
Other comprehensive income (loss):
Foreign currency translation adjustment	354	259	23
Unrealized gain on foreign currency contracts	0	0	145
Total other comprehensive income	354	259	168
Comprehensive loss	$ (137,896)	$ (60,941)	$ (44,068)
Basic and diluted net loss per share (in dollars per share)	$ (5.81)	$ (2.95)	$ (2.33)
Weighted average shares outstanding used in computing basic and diluted net loss per share (in shares)	23,790	20,732	18,993