Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2021	Nov. 10, 2021
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Sep. 30, 2021
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	000-16929
Entity Registrant Name	SOLIGENIX, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	41-1505029
Entity Address, Address Line One	29 EMMONS DRIVE, SUITE B-10
Entity Address, City or Town	PRINCETON,
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08540
City Area Code	609
Local Phone Number	538-8200
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Central Index Key	0000812796
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Common Stock, Shares Outstanding		42,873,438
Amendment Flag	false
Common Stock
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $.001 per share
Trading Symbol	SNGX
Security Exchange Name	NASDAQ
Purchase warrants
Document Information [Line Items]
Title of 12(b) Security	Common Stock Purchase Warrants
Trading Symbol	SNGXW
Security Exchange Name	NASDAQ