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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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- Definition Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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- Definition Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt securities classified as available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27161-111563 + Details
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