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Discontinued Operations of Adeona Clinical Laboratory and Note Receivable (Details Textual) (Promissory Note [Member], Adeona Clinical Laboratory, LLC [Member], USD $) | 12 Months Ended |
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Dec. 31, 2013 | Mar. 08, 2012
Promissory Note [Member] | Adeona Clinical Laboratory, LLC [Member] |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Notes Payable |  | $ 700,000 us-gaap_NotesPayable / us-gaap_CreditFacilityAxis = us-gaap_CommercialPaperMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = syn_AdeonaClinicalLaboratoryLlcMember
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  | 5.70%us-gaap_LongTermDebtPercentageBearingVariableInterestRate / us-gaap_CreditFacilityAxis = us-gaap_CommercialPaperMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = syn_AdeonaClinicalLaboratoryLlcMember
Provision for Doubtful Accounts | $ 763,000 us-gaap_ProvisionForDoubtfulAccounts / us-gaap_CreditFacilityAxis = us-gaap_CommercialPaperMember / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = syn_AdeonaClinicalLaboratoryLlcMember |

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- Details
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + 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 (a) -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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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