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Income Taxes (Narrative) (Details) - USD ($)	12 Months Ended
	Jan. 01, 2021	Dec. 27, 2019	Dec. 28, 2018	Dec. 29, 2017
Income Tax Disclosure [Abstract]
U.S statutory income tax expense rate	21.00%	21.00%	21.00%	35.00%
Tax cuts and jobs act of 2017, provisional income tax benefit				$ 4,000,000.0
Deferred tax and transition tax calculations				$ 0
U.S. operating loss carryforwards	$ 900,000
Foreign net operating loss carryforwards	11,600,000
Valuation allowance	1,558,000	$ 1,571,000
Undistributed earnings in foreign subsidiaries	3,900,000
Transition tax	0
Accrued income tax-related interest and penalties	167,000	155,000
ASC 740-10 tax liabilities, current	$ 425,000	$ 413,000	$ 402,000

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