Quarterly report pursuant to Section 13 or 15(d)

Selected Balance Sheet Information (Details)

v3.8.0.1
Selected Balance Sheet Information (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Dec. 31, 2017
Other Current Assets [Line Items]    
Prepaid consulting, subscriptions and other expenses $ 265 $ 290
Prepaid insurances 237 351
Prepaid conferences and travel 104 94
Clinical consulting services refund receivable 0 46
Prepaid clinical research organizations 0 46
Total $ 606 $ 827