Investments, Debt and Equity Securities (Details) - USD ($) $ in Thousands	Jun. 29, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, amortized cost	$ 40,819	$ 36,669
Available-for-sale debt securities, gross unrealized gains	230	411
Debt securities, available-for-sale, gross unrealized losses	(41)	(18)
Available-for-sale debt securities:	41,008	37,062
Marketable equity securities:	13,560	12,102
Less than one year	20,656
Less than one year	20,805
One year through five years	20,163
One year through five years	20,203
Six years through ten years	0
Six years through ten years	0
After ten years	0
After ten years	0
Total	40,819
Total	41,008
United States Government and agency securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, amortized cost	40,819	36,409
Available-for-sale debt securities, gross unrealized gains	230	411
Debt securities, available-for-sale, gross unrealized losses	(41)	(18)
Available-for-sale debt securities:	$ 41,008	36,802
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale debt securities, amortized cost		260
Available-for-sale debt securities, gross unrealized gains		0
Debt securities, available-for-sale, gross unrealized losses		0
Available-for-sale debt securities:		$ 260