Quarterly report pursuant to Section 13 or 15(d)

Prepaid Expenses and Other Current Assets (Detail)

v3.10.0.1
Prepaid Expenses and Other Current Assets (Detail) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]    
Prepaid research and development services $ 51 $ 384
Prepaid insurance 317 279
Other prepaid expenses 98 62
Other receivable due from R-Pharm 175 251
Other current assets 51 91
Total prepaid expenses and other current assets $ 692 $ 1,067