Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues	$ 229,686	$ 202,517
Cost of revenues	120,064	105,400
Gross profit	109,622	97,117
Operating expenses:
Research and development	18,652	16,078
Selling, general, and administrative	78,819	68,278
Total operating expenses	97,471	84,356
Income from operations	12,151	12,761
Interest and other income (expense), net	(822)	(1,410)
Income before provision for income taxes	11,329	11,351
Provision for income taxes	18	8,067
Net income	$ 11,311	$ 3,284
Net income per share:
Net income per share - basic (in dollars per share)	$ 0.27	$ 0.08
Net income per share - diluted (in dollars per share)	$ 0.26	$ 0.08
Weighted-average shares outstanding:
Weighted-average shares outstanding — basic (in shares)	42,357	40,692
Weighted-average shares outstanding — diluted (in shares)	43,621	42,281
Product revenues
Revenues	$ 170,073	$ 145,610
Cost of revenues	90,272	78,811
Services and other revenues
Revenues	59,613	56,907
Cost of revenues	$ 29,792	$ 26,589