Document and Entity Information - shares	6 Months Ended
	Jan. 31, 2020	Feb. 28, 2020
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jan. 31, 2020
Current Fiscal Year End Date	--07-31
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2020
Entity Registrant Name	COMTECH TELECOMMUNICATIONS CORP /DE/
Entity Central Index Key	0000023197
Entity Interactive Data Current	Yes
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		24,719,404