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ACCRUED LIABILITIES
 6 Months Ended
Jun. 30, 2020
Payables and Accruals [Abstract]  
ACCRUED LIABILITIES ACCRUED LIABILITIES
Accrued liabilities consisted of the following (in thousands):
June 30,
2020		December 31,
2019
Accrued contracted research and development services$4,443  $4,532  
Accrued license fee1,000  —  
Accrued professional fees365  1,788  
Accrued compensation453  59  
Total$6,261  $6,379