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Earn-out Milestone Liability (Tables) | 12 Months Ended
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Dec. 31, 2020
Hercules Warrant [Member] |
Schedule of Changes in Earn-out Milestone Liability | The following is a summary of the changes in the earn-out milestone liability for 2019 and 2020:
Balance at January 1, 2019 |  | $ | 8,907,664 |
Non-cash gain from the adjustment for the change in fair value included in 2019 net loss |  |  | (3,189,955 | )
Balance at December 31, 2019 |  |  | 5,717,709 |
Non-cash loss from the adjustment for the change in fair value included in 2020 net loss |  |  | 1,300,291 |
Balance at December 31, 2020 |  | $ | 7,018,000 |

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