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Warrant Liabilities (Details) (Warrant [Member], USD $)
0 Months Ended 1 Months Ended 9 Months Ended 12 Months Ended
Aug. 19, 2014
Jan. 22, 2014
Jun. 25, 2013
Sep. 30, 2014
Dec. 31, 2013
Warrant [Member]
         
Summary of assumptions used in connection with the valuation of warrants issued          
Number of shares underlying the warrants 5,059,438sngx_NumberOfSharesUnderlyingWarrants
/ us-gaap_StatementEquityComponentsAxis
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5,309,438sngx_NumberOfSharesUnderlyingWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
5,416,851sngx_NumberOfSharesUnderlyingWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
4,723,357sngx_NumberOfSharesUnderlyingWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
5,309,438sngx_NumberOfSharesUnderlyingWarrants
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Exercise price $ 1.65us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.65us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.65us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.65us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.65us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Volatility 130.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
135.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
140.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
128.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
135.00%us-gaap_FairValueAssumptionsWeightedAverageVolatilityRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Risk-free interest rate 1.25%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
1.30%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
1.49%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
1.43%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
1.75%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Expected dividend yield 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
Expected warrant life (years) 3 years 10 months 6 days 4 years 5 months 1 day 5 years 3 years 8 months 27 days 4 years 6 months
Stock Price $ 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
$ 2.00us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember
$ 1.80us-gaap_SharePrice
/ us-gaap_StatementEquityComponentsAxis
= us-gaap_WarrantMember