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Accrued Expenses
 6 Months Ended
Jun. 30, 2020
Accrued Liabilities, Current [Abstract]  
Accrued Expenses Accrued Expenses
Accrued expenses consist of the following (amounts in thousands):
June 30,
2020		December 31,
2019
Compensation and related benefits$1,664  $2,042  
Professional fees1,454  2,929  
Preclinical and clinical costs3,208  1,820  
Insurance premiums475  1,423  
Other565  852  
Total$7,366  $9,066