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Certain Financial Statement Information (Details 13) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Schedule of Warranty Reserve Activity
Beginning balance	$ 447	$ 197	$ 454	$ 176
Charged to costs of revenues	85	99	215	305
Charges incurred	(162)	(52)	(299)	(237)
Ending balance	$ 370	$ 244	$ 370	$ 244

- 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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