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v3.22.1

Stock Warrants (Tables) | 3 Months Ended
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Mar. 31, 2022
Stock Warrants |
Summary of all warrant activity | A summary of all warrant activity for the Company for the quarter ended March 31, 2022 and the year ended December 31, 2021 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | Weighted Average
​ | ​ | Warrants | ​ | Exercise Price
Balance at December 31, 2020 |  | 18,000,713 | ​ | ​ | 0.69
Granted |  | — | ​ |  | —
Exercised |  | (11,655,747) | ​ |  | 0.69
Forfeited |  | — | ​ |  | —
Balance at December 31, 2021 |  | 6,344,966 | ​ | $ | 0.69
Granted | ​ | — | ​ | ​ | —
Exercised | ​ | — | ​ | ​ | —
Forfeited | ​ | — | ​ | ​ | —
Balance at March 31, 2022 | ​ | 6,344,966 | ​ | $ | 0.69
Summary of all outstanding and exercisable warrants | A summary of all outstanding and exercisable common stock warrants as of March 31, 2022 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | ​ |  | ​ |  | Weighted Average
​ | ​ | Warrants | ​ | Warrants | ​ | Remaining
Exercise Price | ​ | Outstanding | ​ | Exercisable | ​ | Contractual Life
$ | 0.69 |  | 6,344,252 |  | 6,344,252 |  | 1.53 years
​ | 18.20 |  | 714 |  | 714 |  | 0.74 years
$ | 0.69 |  | 6,344,966 |  | 6,344,966 |  | 1.53 years

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- Definition Tabular disclosure of warrant activity. + References No definition available. + Details
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Namespace Prefix: | syn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Definition Tabular disclosure relates to warrant outstanding and exercisable. + References No definition available. + Details
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Namespace Prefix: | syn_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | syn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration