Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses (Details)

v3.7.0.1
Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Accrued Liabilities    
Employee compensation and benefits $ 831 $ 1,911
External research and preclinical development 2,482 3,290
Professional fees 631 819
Facilities 41 90
Restricted stock liability 4 5
Total accrued expenses $ 3,989 $ 6,115