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Current Accrued Expenses - Schedule of Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Payables And Accruals [Abstract]    
Compensation, excluding taxes $ 692 $ 2,187
Professional fees 391 341
Short-term portion of lease restructuring 220 239
Clinical trial expenses 219 124
Other 721 712
Total accrued expenses $ 2,243 $ 3,603