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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2021
Stock-Based Compensation |
Summary of stock option activity | A summary of stock option activity for the three months ended March 31, 2021 and the year ended December 31, 2020 is as follows:
|  |  |  | Weighted |  | Weighted Average |  | Aggregate
|  |  |  | Average Exercise |  | Remaining |  | Intrinsic
|  | Options |  | Price |  | Contractual Life |  | Value
Balance - December 31, 2019 |  | 2,502,012 |  | $ | 3.62 |  | 6.51 years |  | $ | 153,353
Granted |  | 1,540,000 |  |  | 0.42 |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Expired |  | (14,944) |  |  | 17.57 |  |  |  |  |
Forfeited |  | (29,650) |  |  | 0.55 |  |  |  |  |
Balance - December 31, 2020 |  | 3,997,418 |  |  | 2.35 |  | 6.09 years |  |  | —
Granted |  | — |  |  | — |  |  |  |  |
Exercised |  | — |  |  | — |  |  |  |  |
Expired |  | — |  |  | — |  |  |  |  |
Forfeited |  | — |  |  | — |  |  |  |  |
Balance - March 31, 2021 - outstanding |  | 3,997,418 |  | $ | 2.35 |  | 5.53 years |  | $ | 856,227
Balance - March 31, 2021 - exercisable |  | 1,645,161 |  | $ | 5.10 |  | 4.52 years |  | $ | 268,034
Grant date fair value of options granted – three months ended March 31, 2021 |  |  |  | $ | — |  |  |  |  |
Weighted average grant date fair value – three months ended March 31, 2021 |  |  |  | $ | — |  |  |  |  |
Grant date fair value of options granted – year ended December 31, 2020 |  |  |  | $ | 412,000 |  |  |  |  |
Weighted average grant date fair value – year ended December 31, 2020 |  |  |  | $ | 0.27 |  |  |  |  |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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