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Commitments And Contingencies (Summary Of Product Warranties) (Details) (USD $) In Thousands	6 Months Ended
	Jul. 31, 2011
Commitments And Contingencies
Balance at January 30, 2011	$ 607
Current accruals	65
Accrual reversals	(444)
Settlements made (in cash or in kind) during period	0
Balance at July 31, 2011	$ 228

- Definition

Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers.

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