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Accrued Expenses - Schedule of Accrued Expenses (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Accrued Liabilities, Current [Abstract]    
Compensation and benefits $ 936 $ 738
Consulting and other vendors 294 284
Legal and professional fees 174 99
Taxes 90  
Other 262 285
Total accrued expenses $ 1,756 $ 1,406