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Stock-Based Compensation (Subsequent Events) (Details) - Subsequent Event | Dec. 15, 2022 shares
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2000 Stock Incentive Plan |
Subsequent Event [Line Items] |
Number of additional shares reserved for issuance (in shares) | 1,000,000
2001 Employee Stock Purchase Plan | ESPP |
Subsequent Event [Line Items] |
Number of additional shares reserved for issuance (in shares) | 250,000

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- Definition Number of additional shares authorized for issuance under share-based payment arrangement. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PlanNameAxis=cmtl_A2000StockIncentivePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
Name: | us-gaap_PlanNameAxis=cmtl_A2001EmployeeStockPurchasePlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_AwardTypeAxis=cmtl_EmployeeStockPurchasePlanEsppMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |