FAIR VALUE MEASUREMENTS (Details) - USD ($) | Mar. 26, 2016 | Dec. 26, 2015 |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 91,273,359 | $ 80,942,817 |
Money Markets, Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 27,635,331 | 19,767,889 |
U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 46,725,591 | 46,464,663 |
Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 5,027,952 | 6,886,495 |
Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 11,494,770 | 7,591,733 |
GCS | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 389,715 | 232,037 |
Level 1 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 43,572,982 | 36,381,078 |
Level 1 | Money Markets, Cash and Equivalents | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 27,635,331 | 19,767,889 |
Level 1 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 15,547,936 | 16,381,152 |
Level 1 | GCS | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 389,715 | 232,037 |
Level 2 | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 47,700,377 | 44,561,739 |
Level 2 | U.S. Government Securities | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 31,177,655 | 30,083,511 |
Level 2 | Corporate Debt | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 5,027,952 | 6,886,495 |
Level 2 | Certificates of Deposit | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | 11,494,770 | 7,591,733 |
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 | GCS | | |
Fair Value Measurements [Line Items] | | |
Financial Instruments, Owned, at Fair Value | $ 0 | $ 0 |