Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Total revenues	$ 117,399	$ 50,894	$ 389,697	$ 162,853
Cost of sales	47,757	21,204	156,116	65,838
Gross profit	69,642	29,690	233,581	97,015
Research and development	13,103	7,468	39,008	22,970
Sales and marketing	26,504	13,588	82,607	40,875
General and administrative	10,620	6,580	32,652	20,483
Acquisition and integration costs	2,521	4,591	10,923	7,022
Total operating expenses	52,748	32,227	165,190	91,350
Operating income (loss)	16,894	(2,537)	68,391	5,665
Interest expense, net	(4,786)	(2,784)	(19,475)	(8,387)
Loss on extinguishment of debt	(1,297)	0	(8,262)	0
Total other expense, net	(6,083)	(2,784)	(27,737)	(8,387)
Income (loss) before income taxes	10,811	(5,321)	40,654	(2,722)
(Benefit) provision for income taxes	(11)	204	(1,050)	355
Net income (loss)	$ 10,822	$ (5,525)	$ 41,704	$ (3,077)
Basic (loss) earnings per share (in usd per share)	$ 0.28	$ (0.16)	$ 1.11	$ (0.09)
Diluted (loss) earnings per share (in usd per share)	$ 0.27	$ (0.16)	$ 1.08	$ (0.09)
Shares used in basic per share calculation (in shares)	39,290	33,913	37,490	33,538
Shares used in diluted per share calculation (in shares)	42,889	33,913	42,467	33,538