Consolidated Statements of Comprehensive Loss - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenues	$ 72,301	$ 78,169	$ 214,953	$ 231,527
Cost of revenues	37,738	42,018	111,472	118,937
Gross profit	34,563	36,151	103,481	112,590
Operating expenses
General and administrative	14,281	12,223	42,534	41,879
Research and development	1,828	1,533	5,134	4,455
Sales and marketing	9,155	12,043	29,460	36,212
Depreciation and amortization	9,234	9,525	27,135	29,243
Total operating expenses	34,498	35,324	104,263	111,789
Income (loss) from operations	65	827	(782)	801
Other expenses
Other expense	11	(9)	102	122
Interest expense	12,371	12,034	38,303	36,487
Loss before income taxes	(12,317)	(11,198)	(39,187)	(35,808)
Income tax provision	390	62	964	391
Net loss	(12,707)	(11,260)	(40,151)	(36,199)
Other comprehensive income (loss), net of tax
Foreign currency translation	2,242	(2,248)	547	(2,293)
Total other comprehensive income (loss), net of tax	2,242	(2,248)	547	(2,293)
Comprehensive loss	$ (10,465)	$ (13,508)	$ (39,604)	$ (38,492)
Net loss per share - basic and diluted	$ (0.30)	$ (0.26)	$ (0.94)	$ (0.85)
Weighted average shares outstanding - basic and diluted	42,529,017	42,497,078	42,529,017	42,390,717