CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
Dec. 25, 2021	Dec. 26, 2020	Dec. 28, 2019
Income Statement [Abstract]
Revenues	$ 769,674	$ 693,616	$ 589,464
Cost of revenues	446,907	405,696	351,968
Gross profit	322,767	287,920	237,496
Operating expenses:
Research and development	100,937	89,034	81,499
Selling, general and administrative	123,792	115,098	106,335
Total operating expenses	224,729	204,132	187,834
Operating income	98,038	83,788	49,662
Interest income	569	1,501	2,714
Interest expense	(602)	(864)	(1,915)
Other income, net	495	750	602
Income before income taxes	98,500	85,175	51,063
Provision for income taxes	14,576	6,652	11,717
Net income	$ 83,924	$ 78,523	$ 39,346
Net income per share:
Basic (in USD per share)	$ 1.08	$ 1.02	$ 0.52
Diluted (in USD per share)	$ 1.06	$ 0.99	$ 0.51
Weighted-average number of shares used in per share calculations:
Basic (in shares)	77,787	76,681	74,994
Diluted (in shares)	79,133	79,001	77,286

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 http://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 http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227