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Financial Instruments (Marketable Debt Securities) (Details) (USD $)			12 Months Ended
	Dec. 28, 2013	Dec. 29, 2012	Dec. 29, 2012 Debt securities	Dec. 28, 2013 U.S. government and agency backed securities	Dec. 29, 2012 U.S. government and agency backed securities	Dec. 28, 2013 Corporate debt and certificates of deposit	Dec. 29, 2012 Corporate debt and certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 96,738,018	$ 65,106,002		$ 68,970,505	$ 38,074,136	$ 27,767,513	$ 27,031,866
Unrealized Gains	0	508,820		0	508,820	0	0
Unrealized Losses	(765,483)	(264,860)		(686,113)	0	(79,370)	(264,860)
Fair Value	95,972,535	65,349,962		68,284,392	38,582,956	27,688,143	26,767,006
Less than One year	34,975,621			12,207,098		22,768,523
One to Five years	48,180,508			44,260,888		3,919,620
Greater than Five years	12,816,406			11,816,406		1,000,000
OTTI losses			$ 200,000

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Amount of available-for-sale debt securities at fair value maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale.

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