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Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) | 12 Months Ended
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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

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