Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2023	Dec. 15, 2023	Mar. 31, 2023
Document Information [Line Items]
Entity, Registrant Name	SONIC FOUNDRY, INC.
Current Fiscal Year End Date	--09-30
Document, Fiscal Period Focus	FY
Document, Fiscal Year Focus	2023
Document, Type	10-K/A
Document, Annual Report	true
Document, Period End Date	Sep. 30, 2023
Document, Transition Report	false
Entity, File Number	000-30407
Entity, Incorporation, State or Country Code	MD
Entity, Tax Identification Number	39-1783372
Entity, Address, Address Line One	222 W. Washington Ave
Entity, Address, City or Town	Madison
Entity, Address, State or Province	WI
Entity, Address, Postal Zip Code	53703
City Area Code	608
Local Phone Number	443-1600
Entity, Well-known Seasoned Issuer	No
Entity, Voluntary Filers	No
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
ICFR Auditor Attestation Flag	true
Document, Financial Statement Error Correction Flag	false
Entity, Shell Company	false
Entity, Public Float			$ 6,424,001
Entity, Common Stock Shares, Outstanding		12,139,360
Auditor Name	Wipfli, LLP
Auditor Location	Minneapolis, Minnesota
Auditor Firm ID	344
Amendment Description	Form 10-K/A year ended 09-30-23
Amendment Flag	true
Entity, Central Index Key	0001029744