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STOCK BASED COMPENSATION (Tables) | 12 Months Ended
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Dec. 31, 2020
STOCK BASED COMPENSATION |
Summary of Stock Options Outstanding |
|  | December 31, 2020 |  | December 31, 2019
|  |  |  | Weighted |  |  |  | Weighted
|  | Number of |  | Average |  | Number of |  | Average
|  | Stock |  | Exercise |  | Stock |  | Exercise
|  | Options |  | Price |  | Options |  | Price
Stock options outstanding at beginning of period |  | 37,786 |  | $ | 37.42 |  | 19,170 |  | $ | 80.00
Granted |  | 149,801 |  |  | 1.67 |  | 20,942 |  |  | 19.25
Expired |  | (2,533) |  |  | 93.80 |  | (1,777) |  |  | 78.00
Canceled or forfeited |  | — |  |  | — |  | (549) |  |  | 19.25
Stock options outstanding at end of period |  | 185,054 |  | $ | 7.70 |  | 37,786 |  | $ | 37.42
Stock options exercisable at end of period |  | 35,253 |  | $ | 33.37 |  | 37,786 |  | $ | 37.42
Summary of Stock Options Outstanding and Exercisable by Stock Option Plan |
|  | Outstanding Stock Options |  | Exercisable Stock Options
|  | Number of |  | Weighted |  | Number of |  | Weighted
|  | Outstanding |  | Average |  | Stock Options |  | Average
Stock Option Plan |  | Stock Options |  | Exercise Price |  | Exercisable |  | Exercise Price
2004 Plan |  | 92 |  | $ | 1,638.00 |  | 92 |  | $ | 1,638.00
2004 Directors’ Plan |  | 3 |  |  | 10,380.00 |  | 3 |  |  | 10,380.00
2013 Plan |  | 158,962 |  |  | 6.57 |  | 33,158 |  |  | 25.47
2020 Inducement Grant |  | 23,997 |  |  | 2.08 |  | — |  |  | —
Replacement Options-Alabama Graphite |  | 2,000 |  |  | 75.08 |  | 2,000 |  |  | —
|  | 185,054 |  | $ | 7.70 |  | 35,253 |  | $ | 33.37
Summary of RSU Activity |
|  | December 31, |  | December 31,
|  | 2020 |  | 2019
|  |  |  | Weighted- |  |  |  | Weighted-
|  |  |  | Average |  |  |  | Average
|  | Number of |  | Grant Date |  | Number of |  | Grant Date
|  | RSUs |  | Fair Value |  | RSUs |  | Fair Value
Unvested RSUs at beginning of period |  | 511 |  | $ | 70.00 |  | 2,260 |  | $ | 70.00
Granted |  | 236,403 |  |  | 2.10 |  | — |  |  | —
Forfeited |  | — |  |  | — |  | (1,749) |  |  | 70.00
Vested |  | (511) |  |  | 70.00 |  | — |  |  | —
Unvested RSUs at end of period |  | 236,403 |  | $ | 2.10 |  | 511 |  | $ | 70.00

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