Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses - Schedule of Accrued Expenses (Detail)

v3.7.0.1
Accrued Expenses - Schedule of Accrued Expenses (Detail) - USD ($)
Jun. 30, 2017
Dec. 31, 2016
Accrued expenses    
Accrued professional fees $ 3,093,303 $ 867,969
Accrued compensation expense 1,123,913 1,198,448
Accrued research and development fees 843,830 1,040,321
Accrued taxes 899,651 0
Accrued audit and tax fees 218,264 454,931
Accrued other 171,880 157,788
Total accrued expenses $ 6,350,841 $ 3,719,457