Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Payables and Accruals [Abstract]
Compensation, including severance	$ 524	$ 229
Professional fees	513	619
Clinical trial expenses	109	143
Other expenses	274	228
Accrued expenses	$ 1,420	$ 1,219