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Stock-Based Compensation (Tables) | 3 Months Ended
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Mar. 31, 2022
Stock-Based Compensation |
Summary of stock option activity | A summary of stock option activity for the three months ended March 31, 2022 and the year ended December 31, 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 |  | 2,260,000 | ​ | ​ | 0.33 |  | ​ | ​ |  | ​
Exercised |  | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Expired |  | (2,143) | ​ | ​ | 45.15 |  | ​ | ​ |  | ​
Forfeited |  | — | ​ | ​ | — |  | ​ | ​ |  | ​
Balance - December 31, 2021 | ​ | 6,255,275 | ​ | ​ | 1.61 | ​ | 5.58 years | ​ | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Granted | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Exercised | ​ | — | ​ | ​ | — | ​ | ​ | ​ | ​ | ​
Expired | ​ | (2,413) | ​ | ​ | 75.60 | ​ | ​ | ​ | ​ | ​
Forfeited | ​ | (145,417) | ​ | ​ | 0.36 | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance - March 31, 2022 - outstanding |  | 6,107,715 | ​ | $ | 1.61 |  | 5.26 years | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Balance - March 31, 2022 - exercisable |  | 3,221,457 | ​ | $ | 2.73 |  | 4.37 years | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Grant date fair value of options granted – three months ended March 31, 2022 | ​ | ​ | ​ | $ | — |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average grant date fair value – three months ended March 31, 2022 | ​ | ​ | ​ | $ | — |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Grant date fair value of options granted – year ended December 31, 2021 | ​ | ​ | ​ | $ | 501,000 |  |  | ​ |  |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Weighted average grant date fair value – year ended December 31, 2021 | ​ | ​ | ​ | $ | 0.22 |  |  | ​ |  |

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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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