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Accrued Expenses (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Accrued Liabilities, Current [Abstract]    
Research and development $ 120,092 $ 271,322
Clinical 406,213 421,788
Professional fees 486,395 917,568
Employee-related 369,499 624,420
Other 1,459 34,947
Total $ 1,383,658 $ 2,270,045