Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenue:
Revenue	$ 147,274	$ 122,965	$ 280,050	$ 241,956
Cost of revenue:
Cost of revenue	83,260	71,066	159,601	144,508
Gross profit	64,014	51,899	120,449	97,448
Operating expenses:
Research and development	16,623	16,040	32,308	30,646
Sales and marketing	12,177	9,437	22,564	17,641
General and administrative	11,217	10,041	21,230	19,077
Total operating expenses	40,017	35,518	76,102	67,364
Income from operations	23,997	16,381	44,347	30,084
Other (expense) income:
Interest income	40	70	73	552
Interest expense	(1,274)	(1,299)	(2,303)	(2,602)
Other, net	(15)	421	(1,168)	(199)
Total other expense	(1,249)	(808)	(3,398)	(2,249)
Income before income taxes	22,748	15,573	40,949	27,835
Income tax provision	3,842	2,271	5,563	3,312
Net income	$ 18,906	$ 13,302	$ 35,386	$ 24,523
Net income per share:
Basic	$ 0.56	$ 0.40	$ 1.05	$ 0.74
Diluted	$ 0.55	$ 0.39	$ 1.03	$ 0.72
Shares used in computing net income per share:
Basic weighted average common shares	33,677	33,116	33,696	32,998
Diluted weighted average common shares	34,311	33,958	34,473	34,023
Product
Revenue:
Revenue	$ 140,156	$ 117,194	$ 266,765	$ 229,327
Cost of revenue:
Cost of revenue	76,688	65,519	147,022	132,691
Services
Revenue:
Revenue	7,118	5,771	13,285	12,629
Cost of revenue:
Cost of revenue	$ 6,572	$ 5,547	$ 12,579	$ 11,817