XML 60 R39.htm IDEA: XBRL DOCUMENT v3.7.0.1
Accrued Expenses and Other Current Liabilities (Detail) - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Dec. 31, 2015
Payables and Accruals [Abstract]      
Clinical trial costs $ 899 $ 3,088 $ 3,294
Professional fees 660 229 435
Compensation and related benefits 976 975 1,535
Interest expense 99 0 28
Accrued expenses and other current liabilities $ 2,634 $ 4,292 $ 5,292