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Other Accrued Liabilities
 12 Months Ended
Dec. 31, 2018
Payables and Accruals [Abstract]  
Other Accrued Liabilities

7. OTHER ACCRUED LIABILITIES

 

Other accrued liabilities at December 31, 2018 and 2017 include the following:

 

    Year Ended December 31,  
    2018     2017  
Amounts due to contract research organizations and
other contractual agreements		   $ 749,369     $ 665,373  
Accrued payroll and related benefits     1,592,590       1,258,265  
Accrued professional fees     198,654       264,668  
Other     45,285       94,521  
Total   $ 2,585,898     $ 2,282,827