Unaudited Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net sales	$ 231,989	$ 166,442	$ 645,803	$ 454,863
Cost of sales	87,422	68,202	239,954	179,838
Gross margin	144,567	98,240	405,849	275,025
Sales, general and administrative	99,295	74,443	403,554	209,763
Research and development	42,382	29,246	143,352	85,187
Total operating expenses	141,677	103,689	546,906	294,950
Income (loss) from operations	2,890	(5,449)	(141,057)	(19,925)
Interest and other income (expense), net	(5,530)	2,040	36,896	4,594
Loss before provision for income taxes	(2,640)	(3,409)	(104,161)	(15,331)
Provision for (benefit from) income taxes	(51,164)	(2,536)	(57,651)	12,227
Net income (loss)	$ 48,524	$ (873)	$ (46,510)	$ (27,558)
Net income (loss) per common and common equivalent shares:
Basic (in dollars per share)	$ 0.73	$ (0.01)	$ (0.71)	$ (0.45)
Diluted (in dollars per share)	$ 0.67	$ (0.01)	$ (0.71)	$ (0.45)
Weighted average number of common and common equivalent shares outstanding:
Basic (in shares)	66,192	63,496	65,139	61,159
Diluted (in shares)	72,441	63,496	65,139	61,159
UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 48,524	$ (873)	$ (46,510)	$ (27,558)
Foreign currency translation adjustments	(793)	1,238	(1,161)	(456)
Comprehensive income (loss)	47,731	365	(47,671)	(28,014)
Product
Net sales	165,803	120,091	463,116	326,134
Cost of sales	71,336	57,798	195,253	150,507
Service
Net sales	66,186	46,351	182,687	128,729
Cost of sales	$ 16,086	$ 10,404	$ 44,701	$ 29,331