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FAIR VALUE MEASUREMENTS (Details) - USD ($)	Sep. 26, 2015	Dec. 27, 2014
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	$ 88,824,417	$ 92,540,061
Money Markets, Cash and Equivalents
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	14,977,484	14,635,802
U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	53,507,040	57,697,142
Corporate Debt
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	6,485,226	5,970,983
Certificates of Deposit
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	12,369,708	12,555,010
Vuzix [Member]
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	1,288,070	1,500,777
GCS [Member]
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	196,889	180,347
Level 1
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	35,474,985	37,535,266
Level 1 | Money Markets, Cash and Equivalents
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	14,977,484	14,635,802
Level 1 | U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	19,012,542	21,218,340
Level 1 | Vuzix [Member]
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	1,288,070	1,500,777
Level 1 | GCS [Member]
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	196,889	180,347
Level 2
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	53,349,432	55,004,795
Level 2 | U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	34,494,498	36,478,802
Level 2 | Corporate Debt
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	6,485,226	5,970,983
Level 2 | Certificates of Deposit
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	12,369,708	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

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- Definition

Fair Value Measurements [Line Items]

+ References

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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

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