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Warrant Liabilities (Details Textual) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Aug. 19, 2014
Jan. 22, 2014
Jun. 25, 2013
Warrant Liabilities (Textual)          
Share Price $ 0.61us-gaap_SharePrice $ 1.80us-gaap_SharePrice     $ 0.96us-gaap_SharePrice
Reclassification of warrant liability upon partial exercise of warrants issued in unit offering $ 1,055,490sngx_AdditionalPaidInCapitalReclassificationOfWarrantLiability $ 201,311sngx_AdditionalPaidInCapitalReclassificationOfWarrantLiability      
Warrant [Member]          
Warrant Liabilities (Textual)          
Amount of initial warrant liability         4,827,788sngx_AmountOfInitialWarrantLiability
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Non-cash charge or the change in the fair value $ (3,436,195)us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 3,654,770us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPeriodIncreaseDecrease
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
     
Share Price $ 0.98us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.80us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 2.05us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 2.29us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 0.96us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Warrants exercised 586,081sngx_WarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
  336,081sngx_WarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
250,000sngx_WarrantsExercised
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
 
Issuance of common stock from cashless exercise of warrants,shares 143,004sngx_IssuanceOfCommonStockFromCashlessExerciseOfWarrantsShares
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember