Fair Value of Financial Instruments - Valuation of financial instruments (Details) - USD ($) $ in Thousands	Dec. 28, 2024	Dec. 30, 2023
Fair Value of Financial Instruments
Cash equivalents	$ 188,057	$ 137,195
Short-term investments	100,554	211,720
Fair Value, Recurring
Fair Value of Financial Instruments
Cash equivalents	188,057	137,195
Short-term investments	100,554	211,720
Total	288,611	348,915
Fair Value, Recurring \| Money market funds
Fair Value of Financial Instruments
Cash equivalents	188,057	137,195
Fair Value, Recurring \| Corporate debt securities
Fair Value of Financial Instruments
Short-term investments	13,514	130,047
Fair Value, Recurring \| Government debt securities
Fair Value of Financial Instruments
Short-term investments	87,040	81,673
Fair Value, Recurring \| Fair Value, Inputs, Level 1
Fair Value of Financial Instruments
Cash equivalents	188,057	137,195
Short-term investments	0	0
Total	188,057	137,195
Fair Value, Recurring \| Fair Value, Inputs, Level 1 \| Money market funds
Fair Value of Financial Instruments
Cash equivalents	188,057	137,195
Fair Value, Recurring \| Fair Value, Inputs, Level 1 \| Corporate debt securities
Fair Value of Financial Instruments
Short-term investments	0	0
Fair Value, Recurring \| Fair Value, Inputs, Level 1 \| Government debt securities
Fair Value of Financial Instruments
Short-term investments	0	0
Fair Value, Recurring \| Fair Value, Inputs, Level 2
Fair Value of Financial Instruments
Cash equivalents	0	0
Short-term investments	100,554	211,720
Total	100,554	211,720
Fair Value, Recurring \| Fair Value, Inputs, Level 2 \| Money market funds
Fair Value of Financial Instruments
Cash equivalents	0	0
Fair Value, Recurring \| Fair Value, Inputs, Level 2 \| Corporate debt securities
Fair Value of Financial Instruments
Short-term investments	13,514	130,047
Fair Value, Recurring \| Fair Value, Inputs, Level 2 \| Government debt securities
Fair Value of Financial Instruments
Short-term investments	$ 87,040	$ 81,673

Fair value portion of asset recognized for present right to economic benefit.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of investments including trading securities, available-for-sale securities, held-to-maturity securities, and short-term investments classified as other and current.

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