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Commitments and Contingencies (Product Warranties) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Commitments And Contingencies Product Warranties Details
Balance at beginning of period	$ 387	$ 362
Accruals for warranties	171	138
Settlements	(153)	(122)
Balance at end of period	$ 405	$ 378

- 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.

+ References+ Details