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Accrued Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Schedule of Accrued Liabilities [Line Items]    
Accrued compensation and related costs $ 1,899 $ 2,527
Accrued inventory costs 2,534 3,553
Accrued professional services 2,995 2,722
Other accrued expenses 1,410 1,011
Total accrued liabilities $ 8,838 $ 9,813 [1]
[1] The financial information in this column was derived from audited financial statements included in the Company's 2013 Annual Report on Form 10-K.