Valuation and Qualifying Accounts - Schedule of Valuation and Qualifying Accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Jan. 01, 2022	Dec. 26, 2020
Allowance For Doubtful Accounts [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,303,000	$ 784,000	$ 1,247,000
Charged to (Recovery of) Costs and Expense	356,000	955,000	327,000
Charged to Other Accounts (net)	0	0	0
Deductions	87,000	436,000	790,000
Balance at End of Period	1,572,000	1,303,000	784,000
Deferred Tax Valuation Allowance [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	10,948,000	14,238,000	14,160,000
Charged to (Recovery of) Costs and Expense	824,000	(3,290,000)	78,000
Charged to Other Accounts (net)	0	0	0
Deductions	0	0	0
Balance at End of Period	$ 11,772,000	10,948,000	14,238,000
Allowance for Convertible Notes Receivable [Member]
Valuation And Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period		$ 0	2,000,000
Charged to (Recovery of) Costs and Expense			0
Charged to Other Accounts (net)			0
Deductions			2,000,000
Balance at End of Period			$ 0