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Accrued Expenses
 12 Months Ended
Dec. 31, 2019
Other Income and Expenses [Abstract]  
Accrued Expenses Accrued Expenses
Accrued expenses consisted of the following
(in thousands)December 31,
2019		December 31,
2018
Accrued employee compensation and benefits$2,916  $924  
Accrued external research and development expenses1,977  754  
Accrued professional fees1,347  1,324  
Other221  249  

$6,461  $3,251