Quarterly report pursuant to Section 13 or 15(d)

Accrued Liabilities - Summary of Accrued Liabilities (Detail)

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Accrued Liabilities - Summary of Accrued Liabilities (Detail) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Payables and Accruals [Abstract]    
Accrued professional fees $ 530,200 $ 842,613
Accrued research and development service fees 473,710 3,865,146
Accrued compensation costs 383,649 1,621,008
Accrued facilities operation expenses 172,281 180,158
Accrued insurance costs 58,201 231,477
Other accrued liabilities 15,840 63,387
Total accrued liabilities $ 1,633,881 $ 6,803,789