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Balance Sheet Details (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Accrued Warranty Obligations
Warranty liability at beginning of period	$ 1,738	$ 2,349	$ 1,525	$ 2,279
Additions charged to operations	1,845	334	2,730	1,197
Deductions from liability	909	974	1,581	1,767
Warranty liability at end of period	$ 2,674	$ 1,709	$ 2,674	$ 1,709

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. For classified balance sheets, represents the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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