Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 522,285	$ 277,743	$ 191,603
Cost of Goods and Services Sold	206,572	121,601	79,872
Gross profit	315,713	156,142	111,731
Research and development	51,649	33,644	38,672
Sales and marketing	108,987	67,248	50,436
General and administrative	44,951	29,192	26,351
Acquisition and integration costs	14,197	16,506	711
Total operating expenses	219,784	146,590	116,170
Operating income (loss)	95,929	9,552	(4,439)
Other expense, net	(24,283)	(17,588)	(12,181)
(Loss) gain on extinguishment of debt	(8,262)	0	421
Total other expense, net	(32,545)	(17,588)	(11,760)
Income (loss) before income taxes	63,384	(8,036)	(16,199)
(Benefit) provision for income taxes	(10,799)	129	(2,391)
Net income (loss)	$ 74,183	$ (8,165)	$ (13,808)
Basic earnings (loss) per share	$ 1.95	$ (0.24)	$ (0.42)
Diluted earnings (loss) per share	$ 1.86	$ (0.24)	$ (0.42)
Shares used in basic per share calculation	37,995	33,734	32,708
Shares used in diluted per share calculation	42,554	33,734	32,708