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STOCK-BASED COMPENSATION
9 Months Ended
Sep. 30, 2023
Share-Based Payment Arrangement [Abstract]  
STOCK-BASED COMPENSATION STOCK-BASED COMPENSATIONThe following table shows total stock-based compensation expense recognized in the accompanying Condensed Consolidated Statements of Operations (in thousands):
Three Months Ended
September 30,
Nine Months Ended
September 30,
2023202220232022
Research and development$3,236 $4,395 $11,996 $13,656 
General and administrative2,953 3,398 9,260 9,746 
Total stock-based compensation expense$6,189 $7,793 $21,256 $23,402