Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Information (Details)

v3.7.0.1
Selected Balance Sheet Information (Details) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Other Current Assets [Line Items]    
Clinical consulting services refund receivable $ 612 $ 0
Prepaid conferences, travel and other expenses 382 295
Grant receivable 315 185
Prepaid insurance 185 358
Prepaid clinical research organizations 46 1,677
Total $ 1,540 $ 2,515