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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2022
Share-Based Payment Arrangement [Abstract] |
Summary of Stock Option Awards and Restricted Stock Grants | A summary of stock option awards and restricted stock grants, inclusive of awards granted under the 2018 Stock Plan and Inducement Option Grants for the nine-months ended September 30, 2022 is presented below: Summary of Stock Option Awards and Restricted Stock Grants
|  | Stock Options |  |  | Restricted Stock Awards |  |  | Weighted Average |
|  | Options Outstanding |  |  | Weighted Average Exercise Price |  |  | Non-vested Restricted Stock Outstanding |  |  | Weighted Average Grant Date Fair Value |  |  | Contractual Terms of Equity Awards (in years) |
Equity awards outstanding at January 1, 2022 |  |  | 441,425 |  |  | $ | 38.50 |  |  |  | 1,481 |  |  | $ | 12.36 |  |  |  |  |
Equity awards granted |  |  | 697,156 |  |  | $ | 2.79 |  |  |  | 55,650 |  |  | $ | 1.96 |  |  |  |  |
Equity awards terminated |  |  | (17,659 | ) |  | $ | 35.28 |  |  |  | (100 | ) |  | $ | 9.45 |  |  |  |  |
Equity awards outstanding at September 30, 2022 |  |  | 1,120,922 |  |  | $ | 16.33 |  |  |  | 57,031 |  |  | $ | 2.23 |  |  |  | 8.1 |
Aggregate intrinsic value of outstanding equity awards at September 30, 2022 |  | $ | 335 |  |  |  |  |  |  | $ | - |  |  |  |  |  |  |  |  |
Equity awards exercisable at September 30, 2022 |  |  | 521,723 |  |  | $ | 27.72 |  |  |  |  |  |  |  |  |  |  |  | 7.5 |
Aggregate intrinsic value of equity awards exercisable at September 30, 2022 |  | $ | - |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Assumptions Used to Determine Fair Value of Options Granted | Schedule of Assumptions Used to Determine Fair Value of Options Granted
|  |  | For the Nine Months Ended September 30, |
|  |  | 2022 |  |  |  | 2021 |
Risk-free interest rate |  |  | 1.74 to 4.14 | % |  |  | 1.54 to 1.74 | %
Expected volatility |  |  | 107.6 to 113.95 | % |  |  | 106.8 to 113.2 | %
Expected life (in years) |  |  | 7.5 to 9.0 |  |  |  | 7.5 to 10.0 |
Expected dividend yield |  |  | - | % |  |  | - | %

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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