Quarterly report pursuant to Section 13 or 15(d)

STOCK-BASED COMPENSATION (Restricted Stock Activity) (Details)

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STOCK-BASED COMPENSATION (Restricted Stock Activity) (Details) - Non-vested restricted stock unit awards
3 Months Ended
Mar. 31, 2020
$ / shares
shares
Number of Restricted Share Units  
Outstanding at beginning of year (in shares) | shares 2,556,004
Granted (in shares) | shares 1,824,965
Vested (in shares) | shares (378,051)
Forfeited (in shares) | shares (240,954)
Outstanding at end of year (in shares) | shares 3,761,964
Weighted- Average Grant-Date Fair Value Per Share  
Outstanding at beginning of year (in dollars per share) | $ / shares $ 3.38
Granted (in dollars per share) | $ / shares 1.69
Vested (in dollars per share) | $ / shares 2.32
Forfeited (in dollars per share) | $ / shares 2.45
Outstanding at end of year (in dollars per share) | $ / shares $ 2.72