Legal Proceedings and Other Matters (Details) (USD $)	Jan. 31, 2012
Legal Proceedings and Other Matters [Abstract]
Total orders received under BFT-1 contract	$ 378,009,000

Total orders received under BFT-1 contract as of the reporting date.

No definition available.

Name:	cmtl_TotalOrdersReceivedUnderBftContract
Namespace Prefix:	cmtl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant