Document and Entity Information	6 Months Ended
	Mar. 31, 2014	Apr. 30, 2014
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2014
Document Fiscal Year Focus	2014
Document Fiscal Period Focus	Q2
Trading Symbol	VIVO
Entity Registrant Name	MERIDIAN BIOSCIENCE INC
Entity Central Index Key	0000794172
Current Fiscal Year End Date	--09-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,555,911