Document And Entity Information	3 Months Ended
	Dec. 31, 2011	Feb. 01, 2012
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Dec. 31, 2011
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	Q1
Entity Filer Category	Smaller Reporting Company
Entity Registrant Name	MICROWAVE FILTER CO INC /NY/
Entity Central Index Key	0000716688
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		2,586,227