Document and Entity Information - shares	9 Months Ended
	Apr. 30, 2016	May. 31, 2016
Document and Entity Information
Entity Registrant Name	CANTEL MEDICAL CORP
Entity Central Index Key	0000019446
Document Type	10-Q
Document Period End Date	Apr. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--07-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		41,701,975
Document Fiscal Year Focus	2016
Document Fiscal Period Focus	Q3