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Accrued Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule of Accrued Liabilities [Line Items]
Accrued compensation and benefits	$ 7,888	$ 10,665
Accrued warranties	2,445	2,365
Professional and legal fees	1,478	966
Other accrued liabilities	3,863	4,080
Accrued liabilities	$ 15,674	$ 18,076

Obligations not otherwise itemized or categorized in the footnotes to the financial statements that are due within one year or operating cycle, if longer, from the balance sheet date.

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- 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. 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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