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FAIR VALUE MEASUREMENTS (Details) - USD ($)	Sep. 24, 2016	Dec. 26, 2015
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	$ 84,362,549	$ 80,942,817
Money Markets, Cash and Equivalents
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	20,998,402	19,767,889
U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	42,438,182	46,464,663
Corporate Debt
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	8,491,436	6,886,495
Certificates of Deposit
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	12,104,762	7,591,733
GCS
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	329,767	232,037
Level 1
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	32,971,559	36,381,078
Level 1 | Money Markets, Cash and Equivalents
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	20,998,402	19,767,889
Level 1 | U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	11,643,390	16,381,152
Level 1 | GCS
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	329,767	232,037
Level 2
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	51,390,990	44,561,739
Level 2 | U.S. Government Securities
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	30,794,792	30,083,511
Level 2 | Corporate Debt
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	8,491,436	6,886,495
Level 2 | Certificates of Deposit
Fair Value Measurements [Line Items]
Financial Instruments, Owned, at Fair Value	12,104,762	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

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- Definition

Fair Value Measurements [Line Items]

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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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