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Other Assets and Amounts Due to / Due From Affiliates (Marketable Equity Securities) (Details) (USD $)	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Equity Method Investments and Joint Ventures [Abstract]
Equity losses in unconsolidated affiliates	$ (386,442)us-gaap_IncomeLossFromEquityMethodInvestments	$ (625,098)us-gaap_IncomeLossFromEquityMethodInvestments	$ (679,587)us-gaap_IncomeLossFromEquityMethodInvestments
Gain on sales of investments	0us-gaap_GainLossOnSaleOfInvestments	1,899,291us-gaap_GainLossOnSaleOfInvestments	856,170us-gaap_GainLossOnSaleOfInvestments
Available-for-sale Securities, Fair Value Disclosure	$ 76,223,135us-gaap_AvailableForSaleSecurities

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

+ References

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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