Document and Entity Information	3 Months Ended
	Dec. 31, 2017 shares
Document and Entity Information [Abstract]
Entity Registrant Name	SIFCO INDUSTRIES INC
Entity Central Index Key	0000090168
Current Fiscal Year End Date	--09-30
Entity Filer Category	Smaller Reporting Company
Document Type	10-Q
Document Period End Date	Dec. 31, 2017
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q1
Amendment Flag	false
Entity Common Stock, Shares Outstanding	5,644,414
Trading Symbol	SIF