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Accrued Expenses and Other Liabilities (Tables)
3 Months Ended
Mar. 31, 2019
Payables And Accruals [Abstract]  
Schedule of Accrued Expenses and Other Liabilities

Accrued expenses and other liabilities consist of the following:

 

 

March 31,

2019

 

 

December 31,

2018

 

Research and development costs and other accrued expenses

$

2,572,814

 

 

$

1,353,987

 

Accrued bonus

 

501,014

 

 

 

 

Professional fees

 

395,497

 

 

 

455,545

 

Vacation pay

 

251,630

 

 

 

 

 

$

3,720,955

 

 

$

1,809,532