Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue:
Revenue	$ 176,694	$ 110,405	$ 456,744	$ 352,361
Cost of revenue:
Cost of revenue	100,182	62,244	259,783	206,752
Gross profit	76,512	48,161	196,961	145,609
Operating expenses:
Research and development	16,707	14,867	49,015	45,513
Sales and marketing	11,415	9,763	33,979	27,404
General and administrative	11,996	9,649	33,226	28,726
Total operating expenses	40,118	34,279	116,220	101,643
Income from operations	36,394	13,882	80,741	43,966
Other (expense) income:
Interest income	51	106	124	658
Interest expense	(1,269)	(1,296)	(3,572)	(3,898)
Other, net	(963)	900	(2,131)	701
Total other expense	(2,181)	(290)	(5,579)	(2,539)
Income before income taxes	34,213	13,592	75,162	41,427
Income tax provision	6,698	2,807	12,261	6,119
Net income	$ 27,515	$ 10,785	$ 62,901	$ 35,308
Net income per share:
Basic	$ 0.82	$ 0.32	$ 1.87	$ 1.06
Diluted	$ 0.81	$ 0.32	$ 1.83	$ 1.04
Shares used in computing net income per share:
Basic weighted average common shares	33,537	33,477	33,643	33,159
Diluted weighted average common shares	34,089	34,174	34,339	34,070
Product
Revenue:
Revenue	$ 169,151	$ 104,799	$ 435,916	$ 334,126
Cost of revenue:
Cost of revenue	93,201	56,427	240,223	189,118
Services
Revenue:
Revenue	7,543	5,606	20,828	18,235
Cost of revenue:
Cost of revenue	$ 6,981	$ 5,817	$ 19,560	$ 17,634