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Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
 12 Months Ended
Dec. 30, 2023
Dec. 31, 2022
Dec. 25, 2021
Income Tax Disclosure [Abstract]      
Tax provision at federal statutory rates $ (4,113,000) $ (4,029,000) $ (2,787,000)
Foreign deferred tax rate differential 13,000 (8,000) (55,000)
Equity compensation awards 450,000 44,000 (560,000)
Permanent items (79,000) 5,218,000 481,000
Increase in net state operating loss carryforwards (780,000) (987,000) (911,000)
Utilization of net operating losses for U.K. research and development refund (24,000) (134,000)
Provision to tax return adjustments and tax rate change (270,000) (36,000) (69,000)
Tax credits 14,000 (441,000) (261,000)
Equity compensation (188,000) 326,000
Uncertain tax position for transfer pricing 156,000 143,000 128,000
Other, net (36,000) 38,000 (6,000)
Change in valuation allowance 4,801,000 414,000 3,977,000
Total provision for income taxes $ 156,000 $ 144,000 $ 129,000