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Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Income Tax Disclosure [Abstract]
State		$ 4,000	$ 5,000
Foreign	129,000	104,000	25,000
Total current provision	129,000	108,000	30,000
Federal	(1,075,000)	(5,165,000)	(7,307,000)
State	(321,000)	(2,341,000)	(360,000)
Foreign	(19,000)	(56,000)	300,000
Change in valuation allowance	1,415,000	7,562,000	7,367,000
Total (benefit) deferred provision
Total provision for income taxes	$ 129,000	$ 108,000	$ 30,000

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