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Accrued Expenses and Other Current Liabilities - Accrued expenses and other current liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Dec. 31, 2015
Accrued Expenses and Other Current Liabilities    
Clinical and preclinical $ 872 $ 871
Contract manufacturing 500 754
Compensation and benefits 1,460 605
Legal 179 243
Audit and tax related 352 376
Other 137 183
Equipment lease, current portion 78  
Deferred rent, current portion   7
Financing Costs   655
Total $ 3,578 $ 3,694