XML 29 R19.htm IDEA: XBRL DOCUMENT
v3.19.1

Stock Warrants (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2019
Stock Warrants [Abstract] |
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] | The assumptions used by the Company are summarized in the following table:
|  | Issuance Date |
Closing stock price |  | $ | 0.88 |
Expected dividends |  |  | 0 | %
Expected volatility |  |  | 90 | %
Risk free interest rate |  |  | 3.01 | %
Expected life of warrant (years) |  |  | 5.00 |
The assumptions used by the Company are summarized in the following table:
|  | Series A |
|  | December 31, 2018 |  |  | December 31, 2017 |  |  | November 18, 2016 |
Closing stock price |  | $ | 0.56 |  |  | $ | 17.85 |  |  | $ | 31.15 |
Expected dividends |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 92.5 | % |  |  | 80 | % |  |  | 85 | %
Risk free interest rate |  |  | 2.50 | % |  |  | 1.97 | % |  |  | 1.58 | %
Expected life of warrant |  |  | 1.9 years |  |  |  | 2.9 years |  |  |  | 4.0 years |
|  | December 31, 2018 |  |  | December 31, 2017 |  |  | October 10, 2014 |
Closing stock price |  | $ | 0.56 |  |  | $ | 17.85 |  |  | $ | 61.25 |
Expected dividends |  |  | 0 | % |  |  | 0 | % |  |  | 0 | %
Expected volatility |  |  | 110 | % |  |  | 80 | % |  |  | 95 | %
Risk free interest rate |  |  | 2.60 | % |  |  | 1.86 | % |  |  | 1.39 | %
Expected life of warrant |  |  | .79 years |  |  |  | 1.79 years |  |  |  | 5.0 years |
The assumptions used by the Company are summarized in the following table:
|  | Issuance Date |
Closing stock price |  | $ | 18.55 |
Expected dividends |  |  | 0 | %
Expected volatility |  |  | 85 | %
Risk free interest rate |  |  | 2.42 | %
Expected life of warrant (years) |  |  | 4.92 |
Schedule Of Estimated Fair Value Of Warrant Liability | The following table summarizes the estimated fair value of the warrant liability (in thousands) :
Balance at December 31, 2017 |  | $ | 4,083 |
Change in fair value of warrant liability |  |  | (4,083 | )
Balance at December 31, 2018 |  |  | - |
Change in fair value of warrant liability |  |  | - |
Balance at March 31, 2019 |  | $ | - |
Schedule Of Warrant Activity [Table Text Block] | A summary of all warrant activity for the Company for the quarter ended March 31, 2019 and the year ended December 31, 2018 is as follows:
|  |  | Number of Warrants |  |  | Weighted Average Exercise Price |
Balance at December 31, 2017 |  |  |  | 915,138 |  |  | $ | 52.50 |
Granted |  |  |  | 18,000,713 |  |  |  | 1.38 |
Exercised |  |  |  | - |  |  |  | - |
Forfeited |  |  |  | - |  |  |  | - |
Balance at December 31, 2018 |  |  |  | 18,915,851 |  |  |  | 3.85 |
Granted |  |  |  | - |  |  |  | - |
Exercised |  |  |  | - |  |  |  | - |
Forfeited |  |  |  | - |  |  |  | - |
Balance at March 31, 2019 |  |  |  | 18,915,851 |  |  | $ | 3.85 |
Schedule Of Warrant Outstanding and Exercisable [Table Text Block] | A summary of all outstanding and exercisable warrants as of March 31, 2019 is as follows:
Exercise Price |  |  | Warrants Outstanding |  |  | Warrants Exercisable |  |  | Weighted Average Remaining Contractual Life |
$ | 1.38 |  |  |  | 17,999,999 |  |  |  | 17,999,999 |  |  |  | 4.54 years |
| 18.20 |  |  |  | 714 |  |  |  | 714 |  |  |  | 3.74 years |
| 50.05 |  |  |  | 714,286 |  |  |  | 714,286 |  |  |  | 1.64 years |
| 61.25 |  |  |  | 200,852 |  |  |  | 200,852 |  |  |  | 0.53 years |
$ | 3.85 |  |  |  | 18,915,851 |  |  |  | 18,915,851 |  |  |  | 4.38 years |

X
- Definition Tabular disclosure of estimated fair value of the warrant liability. + References No definition available. + Details
Name: | syn_ScheduleOfEstimatedFairValueOfWarrantLiability
Namespace Prefix: | syn_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of warrant activity. + References No definition available. + Details
Name: | syn_ScheduleOfWarrantActivityTableTextBlock
Namespace Prefix: | syn_
Data Type: | nonnum: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: | nonnum: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

X
- Definition Tabular disclosure of input and valuation technique used to measure fair value and change in valuation approach and technique for each separate class of asset and liability measured on recurring and nonrecurring basis. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=99377789&loc=d3e19207-110258 + Details
Name: | us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration