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Schedule of Contractual Maturity (Details) - USD ($)	Dec. 26, 2020	Dec. 28, 2019
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Less than One year	$ 1,102,171
One to Five years	2,533,510
Debt Securities, Available-for-sale	3,635,681	$ 15,752,997
US Government Agencies Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Less than One year
One to Five years	1,023,120
Debt Securities, Available-for-sale	1,023,120
Corporate Debt Securities [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Less than One year	1,102,171
One to Five years	1,510,390
Debt Securities, Available-for-sale	$ 2,612,561

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- Definition

Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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