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Schedule of Available for Sale Marketable Securities (Detail) - USD ($) $ in Thousands	Sep. 28, 2025	Dec. 31, 2024
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	$ 108,145	$ 126,001
Available-for-sale marketable securities, Unrealized Gain	343	98
Available-for-sale marketable securities, Unrealized (Loss)	(8,567)	(10,078)
Available-for-sale marketable securities, Fair Market Value	99,921	116,021
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	49,624	63,538
U.S. Treasury Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	49,271	49,879
Available-for-sale marketable securities, Unrealized Gain	63	14
Available-for-sale marketable securities, Unrealized (Loss)	(4,575)	(4,951)
Available-for-sale marketable securities, Fair Market Value	44,759	44,942
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	21,338	30,530
Corporate Debt Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	40,281	40,395
Available-for-sale marketable securities, Unrealized Gain	280	79
Available-for-sale marketable securities, Unrealized (Loss)	(3,813)	(4,778)
Available-for-sale marketable securities, Fair Market Value	36,748	35,696
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	24,216	27,824
Debt Mutual Funds
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	14,945	9,299
Available-for-sale marketable securities, Unrealized Gain	0	0
Available-for-sale marketable securities, Unrealized (Loss)	(179)	(348)
Available-for-sale marketable securities, Fair Market Value	14,766	8,951
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	2,972	3,238
Certificates of Deposit and Time Deposits
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	1,613	21,689
Available-for-sale marketable securities, Unrealized Gain	0	0
Available-for-sale marketable securities, Unrealized (Loss)	0	0
Available-for-sale marketable securities, Fair Market Value	1,613	21,689
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	0	0
U.S. Government Agency Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	1,098	3,966
Available-for-sale marketable securities, Unrealized Gain	0	5
Available-for-sale marketable securities, Unrealized (Loss)	0	(1)
Available-for-sale marketable securities, Fair Market Value	1,098	3,970
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	1,098	1,946
Non-U.S. Government Securities
Schedule of Available-for-sale Securities
Available-for-sale marketable securities, Cost	937	773
Available-for-sale marketable securities, Unrealized Gain	0	0
Available-for-sale marketable securities, Unrealized (Loss)	0	0
Available-for-sale marketable securities, Fair Market Value	937	773
Available-for-sale marketable securities, Fair Market Value of Investments with Unrealized Losses	$ 0	$ 0

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