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Stockholders' Equity (Tables) | 6 Months Ended
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Jun. 30, 2021
Equity [Abstract] |
Schedule of Stock Option Activity | The following table summarizes the activity for stock options and warrants for the six months ended June 30, 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 |  | 176,875 |  |  | 1.59 |  |  |  |  |  |  | 19,519,393 |  |  | 2.90 |  |  |  |  |
Exercised |  | (7,250) |  |  | 3.28 |  |  |  |  |  |  | (801,148) |  |  | 2.19 |  |  |  |  |
Forfeited |  | (19,492) |  |  | 1.92 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Expired |  | (108,624) |  |  | 34.28 |  |  |  |  |  |  | — |  |  | — |  |  |  |  |
Outstanding at June 30, 2021 |  | 1,005,209 |  |  | $ | 10.55 |  |  | 6.63 |  | $ | 5.1 |  |  | 21,356,600 |  |  | $ | 2.84 |  |  | 4.88 |  | $ | — |
Vested at June 30, 2021 or expected to vest in the future |  | 984,976 |  |  | $ | 10.72 |  |  | 6.58 |  | $ | 4.9 |  |  | 21,356,600 |  |  | $ | 2.84 |  |  | 4.88 |  | $ | — |
Vested at June 30, 2021 |  | 743,847 |  |  | $ | 13.31 |  |  | 5.82 |  | $ | 0.7 |  |  | 21,356,600 |  |  | $ | 2.84 |  |  | 4.88 |  | $ | — |
Schedule of Restricted Stock Activity | During the six months ended June 30, 2021 and 2020, the Company issued restricted stock for services as follows ($ in thousands):
|  | Six Months Ended June 30,
|  | 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 six months ended June 30, 2021 and 2020, the Company issued restricted stock units for services as follows ($ in thousands, except share data):
| Six Months Ended June 30,
| 2021 |  | 2020
Number of restricted stock units issued | 458,245 |  |  | 195,320 |
Value of restricted stock units issued | $ | 729 |  |  | $ | 623 |

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