Fair Value Measurements and Financial Instruments (Details) - USD ($) $ in Thousands	Jun. 29, 2024	Dec. 31, 2023
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Certificates of deposits, current	$ 23,913	$ 20,959
Available-for-sale debt securities:	41,008	37,062
Marketable equity securities:	13,560	12,102
United States Government and agency securities
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	36,802
Corporate notes and bonds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:		260
Total carrying value
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	37,062
Marketable equity securities:	13,560	12,102
Fair value, measurements, recurring [Member] | Total carrying value
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	37,062
Marketable equity securities:	13,560	12,102
Deferred compensation	1,458	1,572
Fair value, measurements, recurring [Member] | Total carrying value | Certificates of deposit
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Certificates of deposits, current	3,109	2,859
Certificates of deposits, noncurrent	3,000	3,500
Fair value, measurements, recurring [Member] | Total carrying value | United States Government and agency securities
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	36,802
Fair value, measurements, recurring [Member] | Total carrying value | Corporate notes and bonds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:		260
Fair value, measurements, recurring [Member] | Total carrying value | Mutual funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	11,946	6,842
Fair value, measurements, recurring [Member] | Total carrying value | Common stock
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:		3,780
Fair value, measurements, recurring [Member] | Total carrying value | Exchange traded funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	1,614	1,480
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1)
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	37,062
Marketable equity securities:	13,560	12,102
Deferred compensation	0	0
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | Certificates of deposit
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Certificates of deposits, current	3,109	2,859
Certificates of deposits, noncurrent	3,000	3,500
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | United States Government and agency securities
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	41,008	36,802
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | Corporate notes and bonds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:		260
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | Mutual funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	11,946	6,842
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | Common stock
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:		3,780
Fair value, measurements, recurring [Member] | Quoted prices in active markets (level 1) | Exchange traded funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	1,614	1,480
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2)
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	0	0
Marketable equity securities:	0	0
Deferred compensation	0	0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | Certificates of deposit
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Certificates of deposits, current	0	0
Certificates of deposits, noncurrent	0	0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | United States Government and agency securities
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	0	0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | Corporate notes and bonds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:		0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | Mutual funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	0	0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | Common stock
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:		0
Fair value, measurements, recurring [Member] | Significant other observable inputs (level 2) | Exchange traded funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	0	0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3)
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	0	0
Marketable equity securities:	0	0
Deferred compensation	1,458	1,572
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | Certificates of deposit
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Certificates of deposits, current	0	0
Certificates of deposits, noncurrent	0	0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | United States Government and agency securities
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:	0	0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | Corporate notes and bonds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Available-for-sale debt securities:		0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | Mutual funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	0	0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | Common stock
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:		0
Fair value, measurements, recurring [Member] | Significant unobservable inputs (level 3) | Exchange traded funds
Fair value, assets and liabilities measured on recurring and nonrecurring basis [Line Items]
Marketable equity securities:	$ 0	$ 0