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Note 6. Cash, Cash Equivalents and Short Term Marketable Securities (Detail) (USD $)	3 Months Ended
	Sep. 26, 2010	Sep. 27, 2009	Mar. 31, 2013	Mar. 28, 2010
Available For Sale Securities Unrealized Losses Net Of Tax			$ 500,000
Available-for-sale Equity Securities, Amortized Cost Basis				425,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ 62,000	$ 91,000

The amount of other than temporary impairment (OTTI) losses on equity securities, OTTI related to credit losses on debt securities, and OTTI losses on debt securities when the entity intends to sell the securities or it is more likely than not that the entity will be required to sell the securities before recovery of its amortized cost basis. Additionally, this item includes OTTI losses recognized during the period on investments accounted for under the cost method of accounting.

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