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v2.4.1.9

Stock Purchase Warrants (Details Textual) (USD $) | 3 Months Ended | 1 Months Ended | 0 Months Ended |
--- | --- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Oct. 25, 2012 | Oct. 10, 2014 | Dec. 31, 2014
Fair Value Adjustment of Warrants | $ 4,152,000 us-gaap_FairValueAdjustmentOfWarrants | $ 0 us-gaap_FairValueAdjustmentOfWarrants |  |  |
Warrant liabilities | 10,908,000 syn_WarrantLiabilities |  |  |  | 6,756,000 syn_WarrantLiabilities
Class of Warrant or Right, Outstanding | 316,522 us-gaap_ClassOfWarrantOrRightOutstanding |  |  |  |
Warrant [Member] |  |  |  |  |
Issuance Of Warrants To Purchase Of Common Stock |  |  | 635,855 syn_IssuanceOfWarrantsToPurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |
Warrants Exercisable Price Per Share |  |  | $ 1.60 syn_WarrantsExercisablePricePerShare / us-gaap_StatementEquityComponentsAxis = us-gaap_WarrantMember |  |
Investment Warrants Expiration Date1 |  |  | Oct. 25, 2017 |  |
Stock Warrants [Member] |  |  |  |  |
Proceeds from Issuance of Common Stock |  |  |  | 19,100,000 us-gaap_ProceedsFromIssuanceOfCommonStock / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Sale of Stock, Number of Shares Issued in Transaction |  |  |  | 14,059,616 us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Sale of Stock, Price Per Share |  |  |  | $ 1.47 us-gaap_SaleOfStockPricePerShare / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Issuance Of Warrants To Purchase Of Common Stock |  |  |  | 0.5 syn_IssuanceOfWarrantsToPurchaseOfCommonStock / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Share Based Compensation Arrangement By Share Based Payment Award Warrants Exercisable Number |  |  |  | 7,029,808 syn_ShareBasedCompensationArrangementByShareBasedPaymentAwardWarrantsExercisableNumber / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Warrants Exercisable Price Per Share |  |  |  | $ 1.75 syn_WarrantsExercisablePricePerShare / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |
Fair Value Adjustment of Warrants | 10,900,000 us-gaap_FairValueAdjustmentOfWarrants / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |  |  |  |
Warrant liabilities | $ 4,200,000 syn_WarrantLiabilities / us-gaap_StatementEquityComponentsAxis = syn_StockWarrantsMember |  |  |  |
Investment Warrants Expiration Date1 |  |  |  | Oct. 10, 2019 |

X
- Definition Expiration date of warrants held. + References No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Definition Warrants issued to purchase common stock. + References No definition available. + Details
Name: | syn_IssuanceOfWarrantsToPurchaseOfCommonStock
Namespace Prefix: | syn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of exercisable share warrants that may be converted as of the balance sheet date. + References No definition available. + Details
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Namespace Prefix: | syn_
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- Definition It represents value of warrant liabilities. + References No definition available. + Details
Name: | syn_WarrantLiabilities
Namespace Prefix: | syn_
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Balance Type: | credit
Period Type: | instant

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- Definition Warrants exercisable price per share. + References No definition available. + Details
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- Definition Number of warrants or rights outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(i)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph i -Article 4 + Details
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- Definition Amount of expense (income) related to adjustment to fair value of warrant liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section 25 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6939902&loc=d3e20148-110875 + Details
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- Definition The cash inflow from the additional capital contribution to the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition The number of shares issued or sold by the subsidiary or equity method investee per stock transaction. + References No definition available. + Details
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- Details
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