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Accrued Expenses and Other Current Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Accrued Expenses and Other Current Liabilities [Line Items]    
Salary and related expenses $ 6,650 $ 12,193
Research and clinical trial costs 1,304 1,311
Accrued interest 958 2,082
Construction in progress 370 342
Other 5,724 5,706
Accrued expenses and other current liabilities $ 15,006 $ 21,634