FAIR VALUE MEASUREMENTS (Details) - USD ($) | Jun. 27, 2015 | Dec. 27, 2014 |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 91,035,972 | $ 92,540,061 |
Money Markets, Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 16,477,501 | 14,635,802 |
U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 55,465,580 | 57,697,142 |
Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 6,421,028 | 5,970,983 |
Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 9,956,453 | 12,555,010 |
Vuzix [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 2,426,404 | 1,500,777 |
GCS [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 289,006 | 180,347 |
Level 1 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 36,694,474 | 37,535,266 |
Level 1 | Money Markets, Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 16,477,501 | 14,635,802 |
Level 1 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 17,501,563 | 21,218,340 |
Level 1 | Vuzix [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 2,426,404 | 1,500,777 |
Level 1 | GCS [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 289,006 | 180,347 |
Level 2 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 54,341,498 | 55,004,795 |
Level 2 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 37,964,017 | 36,478,802 |
Level 2 | Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 6,421,028 | 5,970,983 |
Level 2 | Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 9,956,453 | 12,555,010 |
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 |
Level 3 | GCS [Member] | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 0 | $ 0 |