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Certain Financial Statement Information (Details 13) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Schedule of Warranty Reserve Activity
Beginning balance	$ 370	$ 244	$ 454	$ 176
Charged to costs of revenues	96	210	311	515
Charges incurred	(108)	(8)	(407)	(245)
Ending balance	$ 358	$ 446	$ 358	$ 446

- 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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