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CASH AND EQUIVALENTS AND MARKETABLE SECURITIES (Details) (USD $)			9 Months Ended
	Sep. 27, 2014	Dec. 28, 2013	Sep. 28, 2013 Debt securities	Sep. 27, 2014 U.S. government and agency backed securities	Dec. 28, 2013 U.S. government and agency backed securities	Sep. 27, 2014 Corporate debt and certificates of deposit	Dec. 28, 2013 Corporate debt and certificates of deposit
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Debt Securities, Amortized Cost Basis	$ 77,253,442	$ 96,738,018		$ 59,328,107	$ 68,970,505	$ 17,925,335	$ 27,767,513
Unrealized Gains	0	0		0	0	0	0
Unrealized Losses	(297,532)	(765,483)		(275,304)	(686,113)	(22,228)	(79,370)
Fair Value	76,955,910	95,972,535		59,052,803	68,284,392	17,903,107	27,688,143
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net, Available-for-sale Securities			0
Available-for-sale Securities, Debt Maturities, Fair Value, Fiscal Year Maturity [Abstract]
Less than one year	26,309,495			11,983,923		14,325,572
One to five years	41,497,591			38,898,806		2,598,785
Greater than five years	9,148,824			8,170,074		978,750
Available-for-sale Securities	$ 76,955,910			$ 59,052,803		$ 17,903,107

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Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale.

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Fair value of available-for-sale debt securities maturing in the second fiscal year through the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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