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Investments: (Tables)

6 Months Ended

Jun. 29, 2013

Investments:

Summary of marketable securities classified as available-for-sale securities

		June 29, 2013						December 29, 2012
		Cost			Fair Value			Cost			Fair Value
Equity securities		$	92,400		$	84,500		$	92,400		$	85,900

Schedule of the Company's unrealized gains and losses for marketable securities classified as available-for-sale securities in accumulated other comprehensive loss

		June 29, 2013			December 29, 2012
Unrealized gains		$	—		$	—
Unrealized losses		(7,900		)	(6,500		)
Net unrealized losses		$	(7,900	)	$	(6,500	)

Schedule of the Company's realized gains and losses recognized on sales of available-for-sale marketable securities

		Three Months Ended						Six Months Ended
		June 29, 2013			June 30, 2012			June 29, 2013			June 30, 2012
Realized gains		$	—		$	—		$	—		$	42,300
Realized losses		—			—			—			(12,300		)
Net realized gains/(losses)		$	—		$	—		$	—		$	30,000

X

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

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