Quarterly report pursuant to Section 13 or 15(d)

Prepaid Expenses and Other Current Assets (Detail)

v3.20.1
Prepaid Expenses and Other Current Assets (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]    
Prepaid research and development services $ 1,176 $ 3,043
Prepaid insurance 92 252
Other prepaid expenses 88 19
Other current assets 914 674
Total prepaid expenses and other current assets $ 2,270 $ 3,988