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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
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   $ 700,000us-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 $ 763,000us-gaap_ProvisionForDoubtfulAccounts
/ us-gaap_CreditFacilityAxis
= us-gaap_CommercialPaperMember
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= syn_AdeonaClinicalLaboratoryLlcMember