Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net sales	$ 218,795	$ 141,259	$ 413,814	$ 288,421
Cost of sales	80,866	53,082	152,532	111,636
Gross margin	137,929	88,177	261,282	176,785
Sales, general and administrative	177,662	72,293	304,259	135,320
Research and development	53,952	29,560	100,970	55,941
Total operating expenses	231,614	101,853	405,229	191,261
Loss from operations	(93,685)	(13,676)	(143,947)	(14,476)
Interest and other income, net	41,841	1,613	42,426	2,554
Loss before provision for income taxes	(51,844)	(12,063)	(101,521)	(11,922)
Provision for (benefit from) income taxes	(4,727)	18,696	(6,487)	14,763
Net loss	$ (47,117)	$ (30,759)	$ (95,034)	$ (26,685)
Net loss per common and common equivalent shares:
Basic (in dollars per share)	$ (0.72)	$ (0.51)	$ (1.47)	$ (0.44)
Diluted (in dollars per share)	$ (0.72)	$ (0.51)	$ (1.47)	$ (0.44)
Weighted average number of common and common equivalent shares outstanding:
Basic (in shares)	65,166	60,346	64,604	59,977
Diluted (in shares)	65,166	60,346	64,604	59,977
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net (loss) income	$ (47,117)	$ (30,759)	$ (95,034)	$ (26,685)
Foreign currency translation adjustments	(369)	678	(368)	(1,694)
Comprehensive loss	(47,486)	(30,081)	(95,402)	(28,379)
Product
Net sales	156,427	98,755	297,313	206,043
Cost of sales	65,301	43,825	123,917	92,709
Service
Net sales	62,368	42,504	116,501	82,378
Cost of sales	$ 15,565	$ 9,257	$ 28,615	$ 18,927