CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 24, 2022	Sep. 25, 2021	Sep. 24, 2022	Sep. 25, 2021
Income Statement [Abstract]
Revenues	$ 180,869	$ 189,964	$ 581,950	$ 564,676
Cost of revenues	118,656	109,745	331,144	331,468
Gross profit	62,213	80,219	250,806	233,208
Operating expenses:
Research and development	26,549	26,026	82,000	75,526
Selling, general and administrative	31,637	30,940	97,949	91,434
Total operating expenses	58,186	56,966	179,949	166,960
Operating income	4,027	23,253	70,857	66,248
Interest income	709	121	1,147	463
Interest expense	(152)	(151)	(463)	(447)
Other income, net	1,041	58	1,784	36
Income before income taxes	5,625	23,281	73,325	66,300
Provision for income taxes	1,274	2,784	8,860	8,273
Net income	$ 4,351	$ 20,497	$ 64,465	$ 58,027
Net income per share:
Basic (in dollars per share)	$ 0.06	$ 0.26	$ 0.83	$ 0.75
Diluted (in dollars per share)	$ 0.06	$ 0.26	$ 0.82	$ 0.73
Weighted-average number of shares used in per share calculations:
Basic (in shares)	77,245	77,869	77,796	77,643
Diluted (in shares)	77,688	79,029	78,492	79,190

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI https://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227