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STOCK-BASED COMPENSATION (Tables)
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Schedule of Stock Based Compensation
The following table summarizes stock-based compensation expenses included in operating costs and expenses:
 Three Months Ended June 30,Six Months Ended June 30,
(In thousands)2020201920202019
Research and development$15,790  $15,282  $31,839  $31,407  
Selling, general and administrative17,965  15,321  36,494  31,228  
Total$33,755  $30,603  $68,333  $62,635