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Schedule of Deferred Tax Assets and Liabilities (Details) - USD ($) | Dec. 30, 2023 | Dec. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Foreign withholding liability | $ (471,000) | $ (483,000)
Federal net operating loss carryforwards | 49,213,000 | 46,618,000
State net operating loss carryforwards | 7,881,000 | 7,381,000
Foreign net operating loss carryforwards | 1,183,000 | 942,000
Equity awards | 37,000 | 34,000
Tax credits | 9,849,000 | 9,854,000
R&D expense amortization | 2,316,000 | 1,900,000
Property, plant and equipment | 598,000 | 624,000
Unrealized losses on investments | 2,292,000 | 1,406,000
Inventory reserves | 1,212,000 | 1,119,000
Other | 1,587,000 | 1,492,000
Net deferred tax assets | 75,697,000 | 70,887,000
Valuation allowance | (76,168,000) | (71,370,000)
Deferred tax assets, net | $ (471,000) | $ (483,000)

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