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STRATEGIC ALLIANCE AND COLLABORATION WITH SERVIER (Tables)
9 Months Ended
Sep. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Components of Collaboration Revenue
Collaboration revenue under the Servier Collaboration Agreement consisted of the following:
Three Months Ended
September 30,
Nine Months Ended
September 30,
2020201920202019
(in thousands)
Research and development reimbursable costs$— $625 $681 $3,471