Document And Entity Information (USD $)	12 Months Ended
	Sep. 30, 2011	Dec. 01, 2011
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2011
Document Fiscal Year Focus	2011
Document Fiscal Period Focus	FY
Entity Filer Category	Smaller Reporting Company
Entity Registrant Name	MICROWAVE FILTER CO INC /NY/
Entity Central Index Key	0000716688
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Current Fiscal Year End Date	--09-30
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding		2,586,227
Entity Public Float		$ 2,474,700