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Accrued Expenses and Other (Tables)
 6 Months Ended
Jun. 30, 2021
Accrued Expenses
Accrued expenses consist of the following:
 
     June 30,
2021		      December 31,
2020		  
     (in thousands)  
Legal and accounting fees
    $ 94      $ 122  
Accrued compensation
      370        789  
Lease liability
      31        44  
Accrued research and development costs and other
      4,570        3,087  
    
 
 
     
 
 
  
Total
    $ 5,065      $ 4,042