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Stock-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2021
Stock-Based Compensation |
Summary of stock option activity | 4. Stock-Based Compensation – (continued) A summary of stock option activity for the nine months ended September 30, 2021 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ |  | Weighted |  | Weighted Average |  | Aggregate
​ | ​ | ​ | ​ | Average Exercise | ​ | Remaining | ​ | Intrinsic
​ | ​ | Options | ​ | Price | ​ | Contractual Life | ​ | Value
Balance - December 31, 2020 |  | 3,997,418 | ​ | $ | 2.35 |  | 6.09 years | ​ | ​ | -
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Granted |  | - | ​ | ​ | - |  | ​ | ​ |  | ​
Exercised |  | - | ​ | ​ | - | ​ | ​ | ​ | ​ | ​
Expired |  | - | ​ | ​ | - |  | ​ | ​ |  | ​
Forfeited |  | - | ​ | ​ | - |  | ​ | ​ |  | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance - September 30, 2021 - outstanding |  | 3,997,418 | ​ | $ | 2.35 |  | 5.03 years | ​ | $ | 135,792
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance - September 30, 2021 - exercisable |  | 2,296,662 | ​ | $ | 3.79 |  | 4.50 years | ​ | $ | 66,093
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Grant date fair value of options granted – nine months ended September 30, 2021 | ​ | ​ | ​ | $ | - |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average grant date fair value –nine months ended September 30, 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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