| Cover | Nov. 07, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Nov. 07, 2023 |
| Current Fiscal Year End Date | --07-31 |
| Entity File Number | 0-7928 |
| Entity Registrant Name | Comtech Telecommunications Corp. |
| Entity Central Index Key | 0000023197 |
| Entity Tax Identification Number | 11-2139466 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 68 South Service Road |
| Entity Address, Address Line Two | Suite 230 |
| Entity Address, City or Town | Melville |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 11747 |
| City Area Code | 631 |
| Local Phone Number | 962-7000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.10 per share |
| Trading Symbol | CMTL |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
