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Accrued Expenses and Other Current Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accrued Expenses and Other Current Liabilities [Line Items]    
Salary and related expenses $ 3,814 $ 2,634
Restructuring 1,376 3,028
Sales and marketing services 144  
Professional fees 875 931
Discounts and allowances for commercial product sales 754  
Accrued interest 619 615
Other 355 483
Construction in progress   238
Accrued expenses and other current liabilities $ 7,937 $ 7,929