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STOCK-BASED COMPENSATION (Tables) | 9 Months Ended
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Sep. 30, 2020
Share-based Payment Arrangement, Noncash Expense [Abstract] |
Schedule of Restricted Stock Activity | The following table summarizes restricted stock unit activity for the nine months ended September 30, 2020:
| Number of Unvested Restricted Stock Units |  | Weighted Average Grant Date Fair Value |  | Number of Unvested Performance Vesting Restricted Stock Units |  | Weighted Average Grant Date Fair Value
Unvested shares as of January 1, 2020 | 4,098,318 |  |  | $ | 4.73 |  |  | 1,783,660 |  |  | $ | 2.96 |
Granted | 3,069,521 |  |  | 0.85 |  |  | — |  |  | — |
Vested | (1,294,285) |  |  | 5.73 |  |  | — |  |  | — |
Forfeited/canceled | (4,166,493) |  |  | 1.67 |  |  | (943,065) |  |  | 1.98 |
Unvested shares as of September 30, 2020 | 1,707,061 |  |  | $ | 4.73 |  |  | 840,595 |  |  | $ | 4.07 |

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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- References No definition available. + Details
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