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Financial Instruments (Contractual Maturities) (Details) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Available-for-sale Securities Contractual Maturities
Less than One year	$ 6,450,257
One to Five years	16,467,759
Debt Securities, Available-for-sale	22,918,016	$ 43,907,457
US Government Agencies Debt Securities [Member]
Available-for-sale Securities Contractual Maturities
Less than One year	3,741,183
One to Five years	9,069,740
Debt Securities, Available-for-sale	12,810,923	34,725,811
Corporate Debt Securities [Member]
Available-for-sale Securities Contractual Maturities
Less than One year	2,709,074
One to Five years	7,398,019
Debt Securities, Available-for-sale	$ 10,107,093	$ 8,980,906

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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 latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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