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FAIR VALUE MEASUREMENTS (Details) (USD $) | Mar. 29, 2014 | Dec. 28, 2013
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Level 1 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 41,119,175 | $ 34,731,771
Level 1 | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 14,811,610 | 16,756,666
Level 1 | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 25,013,792 | 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 | 1,293,773 | 1,433,102
Level 2 |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 66,320,420 | 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 | 48,486,311 | 51,742,389
Level 2 | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 4,709,186 | 12,984,331
Level 2 | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,124,923 | 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 | 107,439,595 | 114,162,303
Estimate of Fair Value | Money Markets, Cash and Equivalents |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 14,811,610 | 16,756,666
Estimate of Fair Value | U.S. Government Securities |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 73,500,103 | 68,284,392
Estimate of Fair Value | Corporate Debt |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 4,709,186 | 12,984,331
Estimate of Fair Value | Certificates of Deposit |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | 13,124,923 | 14,703,812
Estimate of Fair Value | Vuzix [Member] |  |
Fair Value Measurements [Line Items] |  |
Financial Instruments, Owned, at Fair Value | $ 1,293,773 | $ 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=6475986&loc=d3e42546-110969 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 38, 40 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Paragraph 80 -Subparagraph Exhibit 4-3 -IssueDate 2006-05-01 -Chapter 4 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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