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Stockholders' Equity (Tables) | 3 Months Ended
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Mar. 31, 2021
Equity [Abstract] |
Schedule of Stock Option Activity | The following table summarizes the activity for stock options and warrants for the three months ended March 31, 2021:
|  | Stock Options |  | Warrants
|  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands) |  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (In Thousands)
Outstanding at December 31, 2020 |  | 963,700 |  |  | $ | 14.64 |  |  | 5.86 |  | $ | — |  |  | 2,638,355 |  |  | $ | 2.18 |  |  | 4.98 |  | $ | — |
Changes during the period: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Granted |  | 155,150 |  |  | 1.60 |  |  |  |  |  |  | 19,519,393 |  |  | 2.90 |  |  |  |  |
Exercised |  | (7,250) |  |  | 3.28 |  |  |  |  |  |  | (801,148) |  |  | 2.19 |  |  |  |  |
Forfeited |  | (7,017) |  |  | 2.20 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Expired |  | (82,359) |  |  | 6.54 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Outstanding at March 31, 2021 |  | 1,022,224 |  |  | $ | 13.48 |  |  | 6.67 |  | $ | — |  |  | 21,356,600 |  |  | $ | 2.84 |  |  | 4.98 |  | $ | — |
Vested at March 31, 2021 or expected to vest in the future |  | 996,573 |  |  | $ | 13.77 |  |  | 6.60 |  | $ | — |  |  | 21,356,600 |  |  | $ | 2.84 |  |  | 4.98 |  | $ | — |
Vested at March 31, 2021 |  | 765,479 |  |  | $ | 17.08 |  |  | 5.87 |  | $ | — |  |  | 21,356,600 |  |  | $ | 2.80 |  |  | 4.98 |  | $ | — |
Schedule of Restricted Stock Activity | During the three months ended March 31, 2021 and 2020, the Company issued restricted stock for services as follows ($ in thousands):
|  | Three Months Ended March 31,
|  | 2021 |  | 2020
Number of restricted stock issued |  | 300,450 |  |  | 156,184 |
Value of restricted stock issued |  | $ | 478 |  |  | $ | 512 |
Schedule of Restricted Stock Units Activity | During the three months ended March 31, 2021 and 2020, the Company issued restricted stock units for services as follows ($ in thousands, except share data):
| Three Months Ended March 31,
| 2021 |  | 2020
Number of restricted stock units issued | 458,245 |  |  | 195,320 |
Value of restricted stock units issued | $ | 729 |  |  | $ | 623 |

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