Financial Instruments (Marketable Debt Securities) (Details) - USD ($)	Dec. 29, 2018	Dec. 30, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 23,239,502	$ 44,204,201
Unrealized Losses	(321,486)	(296,744)
Fair Value	22,918,016	43,907,457
US Government Agencies Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,064,418	35,014,593
Unrealized Losses	(253,495)	(288,782)
Fair Value	12,810,923	34,725,811
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	10,175,084	8,988,608
Unrealized Losses	(67,991)	(7,702)
Fair Value	10,107,093	8,980,906
Certificates of Deposit [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	0	201,000
Unrealized Losses	0	(260)
Fair Value	$ 0	$ 200,740

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-Subparagraph (b)
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