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Cover - USD ($)
 12 Months Ended
Jul. 31, 2025
Nov. 20, 2025
Jan. 31, 2025
Cover [Abstract]      
Document Type 10-K/A    
Document Annual Report true    
Document Period End Date Jul. 31, 2025    
Current Fiscal Year End Date --07-31    
Document Transition Report false    
Entity File Number 0-7928    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 11-2139466    
Entity Address, Address Line One 305 N 54th Street    
Entity Address, City or Town Chandler    
Entity Address, State or Province AZ    
Entity Address, Postal Zip Code 85226    
City Area Code (480)    
Local Phone Number 333-2200    
Title of 12(b) Security Common Stock, par value $.10 per share    
Trading Symbol CMTL    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Non-accelerated Filer    
Entity Small Business true    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 58,100,000
Entity Common Stock, Shares Outstanding   29,629,242  
Amendment Flag false    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2025    
Registrant Name COMTECH TELECOMMUNICATIONS CORP /DE/    
Central Index Key 0000023197