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Balance Sheet Details (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Accrued warranty obligations
Warranty liability at beginning of period	$ 2,674	$ 1,709	$ 1,525	$ 2,279
Additions charged to operations	849	1,035	3,579	2,238
Deductions from liability	(1,042)	(1,015)	(2,623)	(2,788)
Warranty liability at end of period	$ 2,481	$ 1,729	$ 2,481	$ 1,729

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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