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Legal Proceedings and Other Matters (Details) (USD $) | Apr. 30, 2012
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Legal Proceedings and Other Matters [Abstract] |
Total orders received under BFT-1 contract | $ 376,355,000

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- Definition Total orders received under BFT-1 contract as of the reporting date. + References No definition available. + Details
Name: | cmtl_TotalOrdersReceivedUnderBftContract
Namespace Prefix: | cmtl_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration