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FAIR VALUE MEASUREMENTS (Details) (USD $) | Jun. 28, 2014 | Dec. 28, 2013
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Level 1 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 37,097,648 | $ 34,731,771
Level 1 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,305,327 | 16,756,666
Level 1 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 22,809,054 | 16,542,003
Level 1 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value |  |
Level 1 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value |  |
Level 1 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 983,267 | 1,433,102
Level 2 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 62,784,462 | 79,430,532
Level 2 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value |  |
Level 2 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 42,131,457 | 51,742,389
Level 2 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 7,534,933 | 12,984,331
Level 2 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,118,072 | 14,703,812
Level 2 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value |  | 0
Level 3 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Level 3 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Level 3 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Level 3 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Level 3 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Level 3 | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 0 | 0
Estimate of Fair Value |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 99,882,110 | 114,162,303
Estimate of Fair Value | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,305,327 | 16,756,666
Estimate of Fair Value | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 64,940,511 | 68,284,392
Estimate of Fair Value | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 7,534,933 | 12,984,331
Estimate of Fair Value | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,118,072 | 14,703,812
Estimate of Fair Value | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 983,267 | $ 1,433,102

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- Definition The aggregate fair value as of the balance sheet date of financial instruments and other positions owned by the entity including: (1) mortgages, mortgage-backed and asset backed securities; (2) US government and agency obligations; (3) state and municipal government obligations; (4) other sovereign government debt; (5) corporate obligations; (6) corporate equities; (7) principal investments; (8) derivative contracts; and (9) physical commodities. Includes both pledged and unpledged holdings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35711157&loc=d3e42546-110969 + Details
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