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Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($)
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]      
Tax provision at federal statutory rates $ (9,201,000) $ (4,113,000) $ (4,029,000)
Foreign tax rate differential 30,000 13,000 (8,000)
Equity compensation awards (136,000) 450,000 44,000
Permanent items 176,000 (79,000)
Expiration of net operating loss carryforwards 3,286,000 5,218,000
Increase in net state operating loss carryforwards (2,119,000) (780,000) (987,000)
Utilization of net operating losses for U.K. research and development refund (24,000)
Provision to tax return adjustments and tax rate change 268,000 (270,000) (36,000)
Tax credits 106,000 14,000 (441,000)
Equity compensation (188,000)
Uncertain tax position for transfer pricing 169,000 156,000 143,000
Other, net (35,000) (36,000) 38,000
Change in valuation allowance 7,626,000 4,801,000 414,000
Total provision for income taxes $ 170,000 $ 156,000 $ 144,000