Income Taxes (Details Textual) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Income Taxes (Textual)
Net operating losses	$ 86,120,000us-gaap_OperatingLossCarryforwards
Tax credit, amount	3,556,000us-gaap_TaxCreditCarryforwardAmount
Period of expiration of various tax credits	Expire from 2018 to 2034
Increase in valuation allowance	3,069,000sngx_IncreaseInValuationAllowance	1,887,000sngx_IncreaseInValuationAllowance
Income tax benefit	(616,872)us-gaap_IncomeTaxExpenseBenefit	(750,356)us-gaap_IncomeTaxExpenseBenefit
New Jersey Tax Jurisdiction [Member]
Income Taxes (Textual)
Net operating losses	$ 5,263,000

Expiration of tax credits.

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Increase in valuation allowance.

+ References

No definition available.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(h))

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Article 4

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Income Tax Expense (or Benefit)

-URI http://asc.fasb.org/extlink&oid=6515339

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 9

-Subparagraph (a),(b)

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

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The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Carryforwards

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