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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION PLANS - Stock Option Activity (Details) - Employee Stock Options And Inducement Option Awards
9 Months Ended
Sep. 30, 2020
shares
Options and Inducement awards  
Outstanding at beginning of period (in shares) 567,842
Granted (in shares) 676,595
Exercised (in shares) 0
Forfeited (in shares) (101,967)
Outstanding at end of period (in shares) 1,142,470
Exercisable (in shares) 350,622