Selected Balance Sheet Information (Details 2) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accrued Expenses [Line Items]
Accrued manufacturing costs	$ 0	$ 247
Accrued vendor payments	133	176
Accrued milestones payments	0	350
Accrued clinical consulting services	164	525
Total	$ 297	$ 1,298