XML 40 R27.htm IDEA: XBRL DOCUMENT
v3.23.1

Stock Warrants (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2022
Stock Warrants. |
Summary of all warrant activity | ​
​ | ​ | ​ | ​ | ​ | ​
​ |  | Number of |  | Weighted Average
​ | ​ | Warrants | ​ | Exercise Price
Balance at December 31,2020 |  | 1,800,072 | ​ | $ | 1.24
Granted |  | — | ​ |  | —
Exercised |  | (1,165,575) | ​ |  | 1.24
Forfeited |  | — | ​ |  | —
Balance at December 31,2021 |  | 634,497 | ​ |  | 1.24
Granted |  | — | ​ |  | —
Exercised |  | — | ​ |  | —
Forfeited |  | (71) | ​ |  | 182
Balance at December 31,2022 |  | 634,426 | ​ | $ | 1.22
​
Summary of all outstanding and exercisable common stock warrants | A summary of all outstanding and exercisable warrants as of December 31, 2022 is as follows: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | ​ |  | ​ |  | Weighted Average
​ | ​ | ​ | Warrants | ​ | Warrants | ​ | Remaining
Exercise Price | ​ | Outstanding | ​ | Exercisable | ​ | Contractual Life
$ | 1.22 |  | 634,426 |  | 634,426 |  | 0.78 years

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

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

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