Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues	$ 411,172	$ 362,963	$ 321,607
Cost of revenues	89,439	79,226	69,517
Gross profit	321,733	283,737	252,090
Operating expenses:
Research and development	81,289	72,548	68,239
Sales and marketing	76,487	67,965	70,833
General and administrative	76,274	46,570	40,765
Total operating expenses	234,050	187,083	179,837
Income from operations	87,683	96,654	72,253
Other income (expense), net:
Interest expense	0	(9)	(106)
Interest income	2,287	5,385	8,443
Other income (expense), net	(573)	7	(607)
Total other income, net	1,714	5,383	7,730
Income before income taxes	89,397	102,037	79,983
Income tax provision	18,437	10,465	10,647
Net income	$ 70,960	$ 91,572	$ 69,336
Net income per share:
Basic (in dollars per share)	$ 1.82	$ 2.34	$ 1.77
Diluted (in dollars per share)	$ 1.77	$ 2.25	$ 1.68
Weighted average shares used in computing net income per share:
Basic (in shares)	39,030	39,167	39,075
Diluted (in shares)	40,118	40,740	41,284