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Summary of Significant Accounting Policies (Details Textual) (USD $)
9 Months Ended 12 Months Ended
Sep. 30, 2014
Segments
Dec. 31, 2013
Segments
Dec. 31, 2012
Sep. 30, 2013
Dec. 31, 2011
Summary of Significant Accounting Policies (Textual)          
Number of active business segments 2us-gaap_NumberOfOperatingSegments 2us-gaap_NumberOfOperatingSegments      
Quarterly vesting period of stock options issued to directors upon re-election 1 year 1 year      
Period of stock option granted to director and employees 10 years 10 years      
Percentage of options, vested immediately 25.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOptionsVestedImmediately 25.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOptionsVestedImmediately      
Percentage of options, vested later till three year 25.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOptionsVestedLater 25.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPercentageOfOptionsVestedLater      
Period of expiration of option upon termination of employee or director 3 months 3 months      
Period of re-measurement of option's price using the Black-Scholes model 3 months 3 months      
Deferred income tax expense   $ 0us-gaap_DeferredIncomeTaxExpenseBenefit      
Recorded tax related interest and penalties   0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense    
Liability for uncertain tax positions     $ 0us-gaap_LiabilityForUncertainTaxPositionsCurrent $ 0us-gaap_LiabilityForUncertainTaxPositionsCurrent  
Description of Stock options issued Stock options issued to employees vest 25% immediately as of the grant date, then 25% each subsequent year for a period of three years. Stock options vest over each three month period from the date of issuance to the end of the three year period. These options have a ten year life for as long as the individuals remain employees or directors. In general, when an employee or director terminates their position the options will expire within three months, unless otherwise extended by the Board. Stock options issued to employees vest 25% immediately as of the grant date, then 25% each subsequent year for a period of three years. Stock options vest over each three month period from the date of issuance to the end of the three year period. These options have a ten year life for as long as the individuals remain employees or directors. In general, when an employee or director terminates their position the options will expire within three months, unless otherwise extended by the Board.      
Minimum [Member]          
Summary of Significant Accounting Policies (Textual)          
Intangible assets, estimated useful life 11 years 11 years      
Maximum [Member]          
Summary of Significant Accounting Policies (Textual)          
Intangible assets, estimated useful life 16 years 16 years      
Option [Member]          
Summary of Significant Accounting Policies (Textual)          
Shares issuable upon exercise of outstanding derivative instruments 2,200,147sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
2,051,511sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
1,457,724sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
1,915,324sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
 
Weighted average exercise price of outstanding derivative instruments 2.54us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
$ 2.63us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
     
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
     
Expected life of stock option 4 years 4 years      
Expected volatility rate     160.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
   
Forfeiture rate 12.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
12.00%sngx_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsForfeitureRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
     
Risk free interest rate     0.51%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
   
Option [Member] | Minimum [Member]          
Summary of Significant Accounting Policies (Textual)          
Expected volatility rate 129.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
136.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Risk free interest rate 1.05%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
0.96%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MinimumMember
     
Option [Member] | Maximum [Member]          
Summary of Significant Accounting Policies (Textual)          
Expected volatility rate 165.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
167.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
     
Risk free interest rate 1.43%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
1.17%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
/ us-gaap_AwardTypeAxis
= us-gaap_StockOptionMember
/ us-gaap_RangeAxis
= us-gaap_MaximumMember
     
Warrant [Member]          
Summary of Significant Accounting Policies (Textual)          
Shares issuable upon exercise of outstanding derivative instruments 6,100,182sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
8,156,526sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
2,843,338sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
8,152,776sngx_SharesIssuableUponExerciseOfOutstandingDerivativeInstruments
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
 
Weighted average exercise price of outstanding derivative instruments 1.90us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
$ 2.17us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
$ 3.13us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember
  $ 4.40us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_AwardTypeAxis
= us-gaap_WarrantMember