Legal Proceedings and Other Matters	9 Months Ended
Apr. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Legal Proceedings and Other Matters	Legal Proceedings and Other Matters U.S. Government Investigations In June 2012, certain officers and employees of the Company received subpoenas issued by the United States District Court for the Eastern District of New York (“EDNY”) seeking certain documents and records relating to Fred Kornberg who was then our Chief Executive Officer and is currently our Executive Chairman. Although the EDNY subpoenas made no specific allegations, we believe the subpoenas related to a grand jury investigation stemming from Mr. Kornberg's contacts with a scientific attaché to the Israeli Purchasing Mission in the United States who Mr. Kornberg met in connection with the sale of our equipment to the State of Israel during the 1980's. This scientific attaché was later alleged to have conducted intelligence operations in the U.S. In August 2012, we were informed by the U.S. government that Mr. Kornberg's security clearance was suspended. At that time, in order to maintain our qualification for government contracts requiring facility security clearance, we made certain internal organizational realignments that have remained in place. Those changes restrict access to classified information to other Comtech senior executives, management and other employees who maintain the required level of clearance. Separately, in connection with an investigation by the SEC into trading in securities of CPI International, Inc. (“CPI”), in March and April 2012, we and Mr. Kornberg received subpoenas from the SEC for documents concerning transactions in CPI stock by Mr. Kornberg and other persons (including one subsidiary employee). Mr. Kornberg purchased CPI stock in November 2010 which was after the September 2010 termination of our May 2010 agreement to acquire CPI. The independent members of our Board of Directors have monitored these matters with the assistance of independent counsel. We and Mr. Kornberg have cooperated with the U.S. government regarding the above matters and have not been contacted by the government with respect to either matter since September 2012. The outcome of any investigation is inherently difficult, if not impossible, to predict. However, based on our work to date in respect of the subpoenas in each matter, we do not believe that it is likely that either investigation will result in a legal proceeding against Mr. Kornberg or the Company. If either of these investigations results in a legal proceeding, it could have a material adverse effect on our business and results of operations. Licensed Technology Dispute In May 2015, we notified a third party that we were terminating their rights to use certain of our technology because they failed to remit payments owed to us pursuant to a written agreement. The technology relates to certain mobile data communications products that we no longer sell. In response, the third party informed us that they believed we were in breach of a written agreement and demanded a return of royalties paid. This dispute is at an early stage, but we do not believe the ultimate outcome of this dispute will have a material adverse effect on our consolidated financial condition or results of operations. Other Proceedings There are certain other pending and threatened legal actions which arise in the normal course of business. Although the ultimate outcome of litigation is difficult to accurately predict, we believe that the outcome of these other pending and threatened actions will not have a material adverse effect on our consolidated financial condition or results of operations.

Legal Proceedings and Other Matters

U.S. Government Investigations

In June 2012, certain officers and employees of the Company received subpoenas issued by the United States District Court for the Eastern District of New York (“EDNY”) seeking certain documents and records relating to Fred Kornberg who was then our Chief Executive Officer and is currently our Executive Chairman. Although the EDNY subpoenas made no specific allegations, we believe the subpoenas related to a grand jury investigation stemming from Mr. Kornberg's contacts with a scientific attaché to the Israeli Purchasing Mission in the United States who Mr. Kornberg met in connection with the sale of our equipment to the State of Israel during the 1980's. This scientific attaché was later alleged to have conducted intelligence operations in the U.S. In August 2012, we were informed by the U.S. government that Mr. Kornberg's security clearance was suspended. At that time, in order to maintain our qualification for government contracts requiring facility security clearance, we made certain internal organizational realignments that have remained in place. Those changes restrict access to classified information to other Comtech senior executives, management and other employees who maintain the required level of clearance.

Separately, in connection with an investigation by the SEC into trading in securities of CPI International, Inc. (“CPI”), in March and April 2012, we and Mr. Kornberg received subpoenas from the SEC for documents concerning transactions in CPI stock by Mr. Kornberg and other persons (including one subsidiary employee). Mr. Kornberg purchased CPI stock in November 2010 which was after the September 2010 termination of our May 2010 agreement to acquire CPI. The independent members of our Board of Directors have monitored these matters with the assistance of independent counsel.

We and Mr. Kornberg have cooperated with the U.S. government regarding the above matters and have not been contacted by the government with respect to either matter since September 2012.

The outcome of any investigation is inherently difficult, if not impossible, to predict. However, based on our work to date in respect of the subpoenas in each matter, we do not believe that it is likely that either investigation will result in a legal proceeding against Mr. Kornberg or the Company. If either of these investigations results in a legal proceeding, it could have a material adverse effect on our business and results of operations.

Licensed Technology Dispute

In May 2015, we notified a third party that we were terminating their rights to use certain of our technology because they failed to remit payments owed to us pursuant to a written agreement. The technology relates to certain mobile data communications products that we no longer sell. In response, the third party informed us that they believed we were in breach of a written agreement and demanded a return of royalties paid. This dispute is at an early stage, but we do not believe the ultimate outcome of this dispute will have a material adverse effect on our consolidated financial condition or results of operations.

Other Proceedings

There are certain other pending and threatened legal actions which arise in the normal course of business. Although the ultimate outcome of litigation is difficult to accurately predict, we believe that the outcome of these other pending and threatened actions will not have a material adverse effect on our consolidated financial condition or results of operations.