Name:	cmtl_CreditFacilityInterestExpenseForPeriod
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represented Consolidated EBITDA less cash paid for taxes, capital expenditures and dividends, the result of which was then divided by the sum of scheduled principal debt payments and cash paid for interest, all of the aforementioned calculated on a trailing twelve month basis

No definition available.

Name:	cmtl_DebtInstrumentCovenantFixedCoverageRatioMinimum
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Balance Type:	na
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Debt Instrument, Covenant, Minimum Liquidity

No definition available.

Name:	cmtl_DebtInstrumentCovenantMinimumLiquidity
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Debt Instrument, Covenant, Net Leverage Ratio, Maximum

No definition available.

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Embedded Derivative, Related to Redemption Features

No definition available.

Name:	cmtl_EmbeddedDerivativeRelatedToRedemptionFeatures
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Line of Credit Facility, Derivative Liability

No definition available.

Name:	cmtl_LineOfCreditFacilityDerivativeLiability
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Line of Credit Facility, Interest Rate

No definition available.

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line of Credit Facility, Interest Rate Increase (Decrease)

No definition available.

Name:	cmtl_LineOfCreditFacilityInterestRateIncreaseDecrease
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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Line of Credit Facility, Noncash Expense

No definition available.

Name:	cmtl_LineOfCreditFacilityNoncashExpense
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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Line of Credit Facility, Prepayment without Principal

No definition available.

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

Line of Credit Facility, Term

No definition available.

Name:	cmtl_LineOfCreditFacilityTerm
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Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

Number of Tranches

No definition available.

Name:	cmtl_NumberOfTranches
Namespace Prefix:	cmtl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

No definition available.

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
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Data Type:	dtr-types:percentItemType
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Amount of increase (decrease) of the credit facility.

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Balance Type:	credit
Period Type:	duration

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
-SubTopic 10
-Name Accounting Standards Codification
-Section S50
-Paragraph 1
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-URI https://asc.fasb.org/1943274/2147480738/235-10-S50-1

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 235
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-Name Accounting Standards Codification
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
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Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 944
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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Namespace Prefix:
Data Type:	na
Balance Type:
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Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	us-gaap_CreditFacilityAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
Data Type:	na
Balance Type:
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Namespace Prefix:
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