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Accrued Expenses and Other Current Liabilities (Narrative) (Details)	3 Months Ended
	Oct. 31, 2024
Payables and Accruals [Abstract]
Minimum coverage period of product warranty from the date of shipment	1 year

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- Definition

Minimum coverage period of product warranty from the date of shipment

+ References

No definition available.

+ Details

Name:	cmtl_MinimumCoveragePeriodOfProductWarrantyFromDateOfShipment
Namespace Prefix:	cmtl_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_PayablesAndAccrualsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration