CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net sales	$ 863,381	$ 681,003	$ 530,860
Cost of sales	322,471	264,672	223,574
Gross margin	540,910	416,331	307,286
Sales, general and administrative	515,007	307,286	212,959
Research and development	194,026	123,195	100,721
Total operating expenses	709,033	430,481	313,680
Loss from operations	(168,123)	(14,150)	(6,394)
Interest and other income, net	26,748	7,859	8,464
Income (loss) before provision (benefit) for income taxes	(141,375)	(6,291)	2,070
Provision (benefit) for income taxes	(81,357)	(4,567)	1,188
Net income (loss)	$ (60,018)	$ (1,724)	$ 882
Net income (loss) per share:
Basic (in dollars per share)	$ (0.91)	$ (0.03)	$ 0.01
Diluted (in dollars per share)	$ (0.91)	$ (0.03)	$ 0.01
Weighted average shares outstanding:
Basic (in shares)	66,191	61,782	59,190
Diluted (in shares)	66,191	61,782	60,018
Net income (loss)	$ (60,018)	$ (1,724)	$ 882
Foreign currency translation adjustments	(1,251)	1,237	417
Unrealized gains (losses) on available-for-sale investments	(207)
Comprehensive income (loss)	(61,476)	(487)	1,299
Product
Net sales	608,525	500,250	399,474
Cost of sales	260,098	224,131	190,683
Service
Net sales	254,856	180,753	131,386
Cost of sales	$ 62,373	$ 40,541	$ 32,891