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Income Taxes - Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 25, 2021	Dec. 26, 2020
Income Tax Reconciliation
U.S. statutory federal tax rate	$ 12,153	$ 20,685	$ 17,887
State taxes and credits, net of federal benefit	16	811	663
Stock-based compensation	(2,772)	(6,118)	(4,962)
Research and development credits	(8,264)	(7,153)	(6,576)
Foreign taxes at rates different than the U.S.	2,404	2,286	415
Other permanent differences	1,964	2,043	400
Global intangible low-taxed income	7	0	0
Foreign derived intangible income	(5,160)	(2,486)	(3,668)
Change in valuation allowance	2,597	2,231	1,862
Tax contingencies, net of reversals	3,124	2,812	2,712
Other	1,063	(535)	(2,081)
Total provision for income taxes	$ 7,132	$ 14,576	$ 6,652

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