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Stock-Based Compensation (Tables) | 6 Months Ended
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Jun. 30, 2020
Share-based Payment Arrangement [Abstract] |
Summary of Stock Option and Restricted Stock Awards | A summary of stock option awards and restricted stock grants for the six-months ended June 30, 2020 is presented below:
|  | 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, 2020 |  |  | 4,332,142 |  |  | $ | 2.63 |  |  |  | 8,750 |  |  | $ | 1.59 |  |  |  |  |
Equity awards granted |  |  | 644,000 |  |  | $ | 3.52 |  |  |  | 429,855 |  |  | $ | 1.16 |  |  |  |  |
Options exercised |  |  | (140,864 | ) |  | $ | 2.64 |  |  |  |  |  |  |  |  |  |  |  |  |
Vested and issued |  |  | - |  |  | $ | - |  |  |  | (429,855 | ) |  | $ | 1.16 |  |  |  |  |
Equity awards forfeited, cancelled or expired |  |  | (110,002 | ) |  | $ | 2.21 |  |  |  | - |  |  | $ | - |  |  |  |  |
Equity awards outstanding at June 30, 2020 |  |  | 4,725,276 |  |  | $ | 2.76 |  |  |  | 8,750 |  |  | $ | 1.59 |  |  |  | 8.3 |
Aggregate intrinsic value of outstanding equity awards at June 30, 2020 |  | $ | 5,494,924 |  |  |  |  |  |  | $ | 7,875 |  |  |  |  |  |  |  |  |
Equity awards exercisable at June 30, 2020 |  |  | 3,194,777 |  |  |  | 2.86 |  |  |  |  |  |  |  |  |  |  |  | 7.8 |
Aggregate intrinsic value of equity awards exercisable at June 30, 2020 |  | $ | 3,733,421 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Assumptions Used to Determine Fair Value of Options Granted | The Company used the following assumptions for determining the fair value of options granted under the Black-Scholes option pricing model:
|  |  | Six Months Ended June 30, |
|  |  | 2020 |  |  |  | 2019 |
Risk-free interest rate |  |  | 0.71% to 1.33 | % |  |  | 2.42%-2.65 | %
Expected volatility |  |  | 100.4% to 104.2 | % |  |  | 101.3%-106.2 | %
Expected life (in years) |  |  | 8.5 to 10.0 |  |  |  | 7.5 to 9.3 |
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 http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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