Annual report pursuant to Section 13 and 15(d)

Selected Balance Sheet Information (Details)

v3.8.0.1
Selected Balance Sheet Information (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Other Current Assets [Line Items]    
Prepaid insurance $ 351 $ 358
Other prepaid expenses 290 185
Prepaid conferences, travel and other expenses 94 295
Clinical consulting services refund receivable 46 0
Prepaid clinical research organizations 46 1,677
Total $ 827 $ 2,515