XML 37 R27.htm IDEA: XBRL DOCUMENT v3.10.0.1
Accrued Expenses - Summary of Accrued Expenses (Detail) - USD ($)
Sep. 30, 2018
Dec. 31, 2017
Accrued Expenses    
Accrued research and development expenses $ 3,390,096 $ 2,702,445
Accrued consulting and other professional fees 363,067 227,811
Other accrued expenses 219,145 304,421
Accrued employee benefits 416,630 331,930
Accrued expenses $ 4,388,938 $ 3,566,607