Investments, Debt and Equity Securities (Details) - USD ($) $ in Thousands	Mar. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	$ 35,072	$ 36,669
Debt securities, available-for-sale, gross unrealized gains	166	411
Debt securities, available-for-sale, gross unrealized losses	(32)	(18)
Available-for-sale debt securities:	35,206	37,062
Less than one year	15,118
Less than one year	15,191
One year through five years	19,954
One year through five years	20,015
Six years through ten years	0
Six years through ten years	0
After ten years	0
After ten years	0
Total	35,072
Total	35,206
Marketable equity securities:	13,510	12,102
United States Government and agency securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	34,812	36,409
Debt securities, available-for-sale, gross unrealized gains	166	411
Debt securities, available-for-sale, gross unrealized losses	(32)	(18)
Available-for-sale debt securities:	34,946	36,802
Corporate notes and bonds
Debt Securities, Available-for-sale [Line Items]
Debt securities, svailable-for-sale, amortized cost	260	260
Debt securities, available-for-sale, gross unrealized gains	0	0
Debt securities, available-for-sale, gross unrealized losses	0	0
Available-for-sale debt securities:	$ 260	$ 260