Product Warranty

9 Months Ended

Dec. 31, 2011

7. Product Warranty

The Company generally provides a one to three-year warranty on its products, commencing upon installation. A provision is recorded upon revenue recognition to cost of revenues for estimated warranty expense based on historical experience.

Product warranty activity was as follows (in thousands):


		Three months ended						Nine months ended
		December 31,						December 31,
		2011			2010			2011			2010
Balance at beginning of period	$	7,055		$	7,374		$	7,907		$	6,431
Change in accruals for warranties during the period		(300	)		2,193			(774	)		6,533
Settlements during the period		(482	)		(1,119	)		(860	)		(4,516	)
Balance at end of period	$	6,273		$	8,448		$	6,273		$	8,448

The Company includes warranty period expirations as changes in accruals for warranties in the table above. The Company includes the warranty accrual within accounts payable and accrued expenses in the unaudited condensed consolidated balance sheets.