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Schedule of Available-for-sale Marketable Debt Securities (Details) - USD ($) | Dec. 25, 2021 | Dec. 26, 2020
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Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] |  |
Amortized Cost | $ 2,500,128 | $ 3,607,645
Unrealized Gains/(Losses) | 7,407 | 28,036
Fair Value | 2,507,535 | 3,635,681
U.S. Government and Agency Backed Securities [Member] |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] |  |
Amortized Cost | 1,000,128 | 1,003,941
Unrealized Gains/(Losses) | 522 | 19,179
Fair Value | 1,000,650 | 1,023,120
Corporate Debt [Member] |  |
Debt Securities, Held-to-maturity, Allowance for Credit Loss [Line Items] |  |
Amortized Cost | 1,500,000 | 2,603,704
Unrealized Gains/(Losses) | 6,885 | 8,857
Fair Value | $ 1,506,885 | $ 2,612,561

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