$CMTL
COMTECH TELECOMMUNICATIONS CORP /DE/ Stock $cmtl

$cmtl Overview Financials Valuation SEC Filings Company Website

2020 Q3 Form 10-K Financial Statement

#000002319720000127 Filed on September 29, 2020

Income Statement

Concept	2020 Q3	2019 Q3	2018 Q3
Revenue	$149.7M	$176.4M	$167.4M
YoY Change	-15.14%	5.34%	13.31%
Cost Of Revenue	$100.0M	$112.4M	$104.4M
YoY Change	-11.03%	7.66%	19.45%
Gross Profit	$49.66M	$64.01M	$62.99M
YoY Change	-22.41%	1.62%	4.26%
Gross Profit Margin	33.18%	36.29%	37.62%
Selling, General & Admin	$23.60M	$31.40M	$27.80M
YoY Change	-24.84%	12.95%	4.91%
% of Gross Profit	47.52%	49.05%	44.14%
Research & Development	$11.30M	$15.70M	$13.90M
YoY Change	-28.03%	12.95%	0.0%
% of Gross Profit	22.75%	24.53%	22.07%
Depreciation & Amortization	$8.200M	$8.500M	$9.200M
YoY Change	-3.53%	-7.61%	4.55%
% of Gross Profit	16.51%	13.28%	14.61%
Operating Expenses	$40.50M	$52.30M	$47.00M
YoY Change	-22.56%	11.28%	3.07%
Operating Profit	$9.163M	$11.71M	$15.99M
YoY Change	-21.75%	-26.76%	7.94%
Interest Expense	-$900.0K	-$2.200M	-$2.700M
YoY Change	-59.09%	-18.52%	3.85%
% of Operating Profit	-9.82%	-18.79%	-16.89%
Other Income/Expense, Net	$200.0K	$0.00	-$100.0K
YoY Change		-100.0%	-200.0%
Pretax Income	$1.900M	$8.200M	$13.30M
YoY Change	-76.83%	-38.35%	9.02%
Income Tax	$800.0K	$2.100M	$17.20M
% Of Pretax Income	42.11%	25.61%	129.32%
Net Earnings	$1.126M	$6.135M	$7.458M
YoY Change	-81.65%	-17.74%	1.97%
Net Earnings / Revenue	0.75%	3.48%	4.45%
Basic Earnings Per Share
Diluted Earnings Per Share	$0.04	$0.25	$0.31
COMMON SHARES
Basic Shares Outstanding	24.99M shares	24.27M shares	23.85M shares
Diluted Shares Outstanding

Balance Sheet

Concept	2020 Q3	2019 Q3	2018 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$47.90M	$45.60M	$43.50M
YoY Change	5.04%	4.83%	4.07%
Cash & Equivalents	$47.88M	$45.58M	$43.48M
Short-Term Investments
Other Short-Term Assets	$20.10M	$14.90M	$13.80M
YoY Change	34.9%	7.97%	1.47%
Inventory	$82.30M	$74.84M	$75.08M
Prepaid Expenses
Receivables	$126.8M	$145.0M	$147.4M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$277.1M	$280.3M	$279.8M
YoY Change	-1.15%	0.19%	16.08%
LONG-TERM ASSETS
Property, Plant & Equipment	$27.04M	$28.03M	$28.99M
YoY Change	-3.53%	-3.32%	-11.75%
Goodwill	$330.5M	$310.5M	$290.6M
YoY Change	6.45%	6.83%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets	$4.551M	$3.864M	$2.743M
YoY Change	17.78%	40.87%	5.38%
Total Long-Term Assets	$652.6M	$607.4M	$565.4M
YoY Change	7.43%	7.43%	-4.34%
TOTAL ASSETS
Total Short-Term Assets	$277.1M	$280.3M	$279.8M
Total Long-Term Assets	$652.6M	$607.4M	$565.4M
Total Assets	$929.6M	$887.7M	$845.2M
YoY Change	4.72%	5.04%	1.57%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$23.42M	$24.33M	$43.93M
YoY Change	-3.73%	-44.61%	49.4%
Accrued Expenses	$85.16M	$78.58M	$62.96M
YoY Change	8.37%	24.83%	-8.24%
Deferred Revenue	$40.25M	$38.68M	$34.45M
YoY Change	4.05%	12.28%
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due	$100.0K	$0.00	$17.21M
YoY Change		-100.0%	11.08%
Total Short-Term Liabilities	$159.7M	$145.3M	$165.3M
YoY Change	9.88%	-12.08%	14.63%
LONG-TERM LIABILITIES
Long-Term Debt	$149.5M	$165.0M	$148.1M
YoY Change	-9.39%	11.42%	-15.97%
Other Long-Term Liabilities	$17.83M	$18.82M	$4.117M
YoY Change	-5.27%	357.18%	55.07%
Total Long-Term Liabilities	$167.3M	$183.8M	$152.2M
YoY Change	-8.97%	20.77%	-14.91%
TOTAL LIABILITIES
Total Short-Term Liabilities	$159.7M	$145.3M	$165.3M
Total Long-Term Liabilities	$167.3M	$183.8M	$152.2M
Total Liabilities	$380.3M	$352.6M	$339.5M
YoY Change	7.86%	3.88%	-3.53%
SHAREHOLDERS EQUITY
Retained Earnings	$417.3M	$420.3M	$405.2M
YoY Change	-0.73%	3.74%	5.21%
Common Stock	$3.992M	$3.928M	$3.886M
YoY Change	1.63%	1.08%	0.62%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$441.8M	$441.8M	$441.8M
YoY Change	0.0%	0.0%	0.0%
Treasury Stock Shares	15.03M shares	15.03M shares	15.03M shares
Shareholders Equity	$549.3M	$535.1M	$505.7M
YoY Change
Total Liabilities & Shareholders Equity	$929.6M	$887.7M	$845.2M
YoY Change	4.72%	5.04%	1.57%

Cashflow Statement

Concept	2020 Q3	2019 Q3	2018 Q3
OPERATING ACTIVITIES
Net Income	$1.126M	$6.135M	$7.458M
YoY Change	-81.65%	-17.74%	1.97%
Depreciation, Depletion And Amortization	$8.200M	$8.500M	$9.200M
YoY Change	-3.53%	-7.61%	4.55%
Cash From Operating Activities	$13.80M	$14.20M	$19.70M
YoY Change	-2.82%	-27.92%	-14.35%
INVESTING ACTIVITIES
Capital Expenditures	-$2.800M	-$2.400M	-$3.300M
YoY Change	16.67%	-27.27%	65.0%
Acquisitions
YoY Change
Other Investing Activities	-$1.100M	$0.00	$0.00
YoY Change
Cash From Investing Activities	-$3.800M	-$2.400M	-$3.300M
YoY Change	58.33%	-27.27%	65.0%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-12.70M	-11.40M	-17.10M
YoY Change	11.4%	-33.33%	-55.0%
NET CHANGE
Cash From Operating Activities	13.80M	14.20M	19.70M
Cash From Investing Activities	-3.800M	-2.400M	-3.300M
Cash From Financing Activities	-12.70M	-11.40M	-17.10M
Net Change In Cash	-2.700M	400.0K	-700.0K
YoY Change	-775.0%	-157.14%	-95.88%
FREE CASH FLOW
Cash From Operating Activities	$13.80M	$14.20M	$19.70M
Capital Expenditures	-$2.800M	-$2.400M	-$3.300M
Free Cash Flow	$16.60M	$16.60M	$23.00M
YoY Change	0.0%	-27.83%	-8.0%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period1 RevenueRemainingPerformanceObligationExpectedTimingOfSatisfactionPeriod1	P24M
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-07-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--07-31
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Entity Registrant Name EntityRegistrantName	COMTECH TELECOMMUNICATIONS CORP /DE/
CY2020	dei	Entity Central Index Key EntityCentralIndexKey	0000023197
CY2019Q3	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2018Q3	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201409Member
CY2019Q3	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2019Q3	us-gaap	Accounting Standards Update Extensible List AccountingStandardsUpdateExtensibleList	us-gaap:AccountingStandardsUpdate201602Member
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	0-7928
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	11-2139466
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	68 South Service Road
CY2020	dei	Entity Address Address Line2 EntityAddressAddressLine2	Suite 230
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Melville
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	11747
CY2020	dei	City Area Code CityAreaCode	(631)
CY2020	dei	Local Phone Number LocalPhoneNumber	962-7000
CY2020	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020Q1	dei	Entity Public Float EntityPublicFloat	703374000	USD
CY2020Q3	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	24994323	shares
CY2020	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020	dei	Entity Small Business EntitySmallBusiness	false
CY2020	dei	Icfr Auditor Attestation Flag IcfrAuditorAttestationFlag	true
CY2020	dei	Entity Shell Company EntityShellCompany	false
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47878000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45576000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	126816000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	145032000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	82302000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	74839000	USD
CY2020Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	20101000	USD
CY2019Q3	us-gaap	Prepaid Expense And Other Assets Current PrepaidExpenseAndOtherAssetsCurrent	14867000	USD
CY2020Q3	us-gaap	Assets Current AssetsCurrent	277097000	USD
CY2019Q3	us-gaap	Assets Current AssetsCurrent	280314000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	27037000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28026000	USD
CY2020Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	30033000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	330519000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	310489000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	258019000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	261890000	USD
CY2020Q3	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	2391000	USD
CY2019Q3	us-gaap	Deferred Finance Costs Noncurrent Net DeferredFinanceCostsNoncurrentNet	3128000	USD
CY2020Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	4551000	USD
CY2019Q3	us-gaap	Other Assets Noncurrent OtherAssetsNoncurrent	3864000	USD
CY2020Q3	us-gaap	Assets Assets	929647000	USD
CY2019Q3	us-gaap	Assets Assets	887711000	USD
CY2020Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	23423000	USD
CY2020Q3	us-gaap	Operating Lease Liability Noncurrent OperatingLeaseLiabilityNoncurrent	24109000	USD
CY2019Q3	us-gaap	Accounts Payable Current AccountsPayableCurrent	24330000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	85104000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	78584000	USD
CY2020Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	8247000	USD
CY2020Q3	us-gaap	Finance Lease Liability Current FinanceLeaseLiabilityCurrent	57000	USD
CY2019Q3	us-gaap	Capital Lease Obligations Current CapitalLeaseObligationsCurrent	757000	USD
CY2020Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	2468000	USD
CY2019Q3	us-gaap	Dividends Payable Current DividendsPayableCurrent	2406000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	40250000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Current ContractWithCustomerLiabilityCurrent	38682000	USD
CY2020Q3	us-gaap	Interest Payable Current InterestPayableCurrent	163000	USD
CY2019Q3	us-gaap	Interest Payable Current InterestPayableCurrent	588000	USD
CY2020Q3	us-gaap	Liabilities Current LiabilitiesCurrent	159712000	USD
CY2019Q3	us-gaap	Liabilities Current LiabilitiesCurrent	145347000	USD
CY2020Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	149500000	USD
CY2019Q3	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	165000000	USD
CY2020Q3	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	1963000	USD
CY2019Q3	us-gaap	Accrued Income Taxes Noncurrent AccruedIncomeTaxesNoncurrent	325000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	17637000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	12481000	USD
CY2020Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	9596000	USD
CY2019Q3	us-gaap	Contract With Customer Liability Noncurrent ContractWithCustomerLiabilityNoncurrent	10654000	USD
CY2020Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	17831000	USD
CY2019Q3	us-gaap	Other Liabilities Noncurrent OtherLiabilitiesNoncurrent	18822000	USD
CY2020Q3	us-gaap	Liabilities Liabilities	380348000	USD
CY2019Q3	us-gaap	Liabilities Liabilities	352629000	USD
CY2020Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q3	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2020Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.10
CY2019Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2020Q3	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	2000000	shares
CY2020Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q3	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2020Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.10
CY2019Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2020Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	100000000	shares
CY2020Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	39924439	shares
CY2019Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	39276161	shares
CY2020Q3	us-gaap	Common Stock Value CommonStockValue	3992000	USD
CY2019Q3	us-gaap	Common Stock Value CommonStockValue	3928000	USD
CY2020Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	569891000	USD
CY2019Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	552670000	USD
CY2020Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	417265000	USD
CY2019Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	420333000	USD
CY2020Q3	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	991148000	USD
CY2019Q3	us-gaap	Stockholders Equity Before Treasury Stock StockholdersEquityBeforeTreasuryStock	976931000	USD
CY2020Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	15033317	shares
CY2019Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	15033317	shares
CY2020Q3	us-gaap	Treasury Stock Value TreasuryStockValue	441849000	USD
CY2019Q3	us-gaap	Treasury Stock Value TreasuryStockValue	441849000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	549299000	USD
CY2019Q3	us-gaap	Stockholders Equity StockholdersEquity	535082000	USD
CY2020Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	929647000	USD
CY2019Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	887711000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2018	us-gaap	Revenues Revenues	570589000	USD
CY2020	us-gaap	Cost Of Revenue CostOfRevenue	389882000	USD
CY2019	us-gaap	Cost Of Revenue CostOfRevenue	424357000	USD
CY2018	us-gaap	Cost Of Revenue CostOfRevenue	346648000	USD
CY2020	us-gaap	Gross Profit GrossProfit	226833000	USD
CY2019	us-gaap	Gross Profit GrossProfit	247440000	USD
CY2018	us-gaap	Gross Profit GrossProfit	223941000	USD
CY2020	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	117130000	USD
CY2019	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	128639000	USD
CY2018	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	113922000	USD
CY2020	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	52180000	USD
CY2019	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	56407000	USD
CY2018	us-gaap	Research And Development Expense ResearchAndDevelopmentExpense	53869000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21595000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18320000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21075000	USD
CY2020	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	0	USD
CY2019	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	3204000	USD
CY2018	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	0	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	20754000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5871000	USD
CY2018	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	0	USD
CY2020	us-gaap	Operating Expenses OperatingExpenses	211659000	USD
CY2019	us-gaap	Operating Expenses OperatingExpenses	206033000	USD
CY2018	us-gaap	Operating Expenses OperatingExpenses	188866000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	15174000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	41407000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	35075000	USD
CY2020	us-gaap	Interest Expense InterestExpense	6054000	USD
CY2019	us-gaap	Interest Expense InterestExpense	9245000	USD
CY2018	us-gaap	Interest Expense InterestExpense	10195000	USD
CY2020	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2019	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	3217000	USD
CY2018	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	190000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-35000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-254000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9310000	USD
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.28
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	28910000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	24626000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2290000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3869000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5143000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.04
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.25
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.03
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24798000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24124000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23825000	shares
CY2019	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	216000	USD
CY2019	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	926000	USD
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24899000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24302000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24040000	shares
CY2017Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	480150000	USD
CY2018	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	8605000	USD
CY2018	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	326000	USD
CY2018	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	855000	USD
CY2018	us-gaap	Stock Issued During Period Value Restricted Stock Award Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardForfeitures	0	USD
CY2018	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4310000	USD
CY2018	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2018	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9411000	USD
CY2018	cmtl	Dividend Equivalent Per Share Declared DividendEquivalentPerShareDeclared	0.40
CY2018	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	300000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2018Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	505684000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11427000	USD
CY2019	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2019	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	3916000	USD
CY2019	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	5606000	USD
CY2019	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2019	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9575000	USD
CY2019	cmtl	Dividend Equivalent Per Share Declared DividendEquivalentPerShareDeclared	0.40
CY2019	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	327000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2019Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	535082000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	9275000	USD
CY2020	us-gaap	Stock Issued During Period Value Stock Options Exercised StockIssuedDuringPeriodValueStockOptionsExercised	468000	USD
CY2020	us-gaap	Stock Issued During Period Value Employee Stock Purchase Plan StockIssuedDuringPeriodValueEmployeeStockPurchasePlan	855000	USD
CY2020	us-gaap	Stock Issued During Period Value Restricted Stock Award Net Of Forfeitures StockIssuedDuringPeriodValueRestrictedStockAwardNetOfForfeitures	0	USD
CY2020	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	4888000	USD
CY2020	us-gaap	Stock Issued During Period Value Acquisitions StockIssuedDuringPeriodValueAcquisitions	11575000	USD
CY2020	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2020	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	9794000	USD
CY2020	cmtl	Dividend Equivalent Per Share Declared DividendEquivalentPerShareDeclared	0.40
CY2020	us-gaap	Dividends Share Based Compensation Cash DividendsShareBasedCompensationCash	294000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	549299000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10561000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	11927000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13655000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21595000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18320000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21075000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9275000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11427000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8569000	USD
CY2020	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	737000	USD
CY2019	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	1099000	USD
CY2018	us-gaap	Amortization Of Financing Costs AmortizationOfFinancingCosts	2196000	USD
CY2020	cmtl	Contract Settlement Costs ContractSettlementCosts	444000	USD
CY2019	cmtl	Contract Settlement Costs ContractSettlementCosts	6351000	USD
CY2018	cmtl	Contract Settlement Costs ContractSettlementCosts	0	USD
CY2020	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2019	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	3217000	USD
CY2018	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	0	USD
CY2020	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	0	USD
CY2019	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	3204000	USD
CY2018	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	0	USD
CY2020	cmtl	Business Combination Change In Fair Value Of Contingent Liability BusinessCombinationChangeInFairValueOfContingentLiability	-4133000	USD
CY2019	cmtl	Business Combination Change In Fair Value Of Contingent Liability BusinessCombinationChangeInFairValueOfContingentLiability	-1056000	USD
CY2018	cmtl	Business Combination Change In Fair Value Of Contingent Liability BusinessCombinationChangeInFairValueOfContingentLiability	0	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	0	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-144000	USD
CY2018	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-79000	USD
CY2020	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	-431000	USD
CY2019	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	1136000	USD
CY2018	us-gaap	Provision For Doubtful Accounts ProvisionForDoubtfulAccounts	573000	USD
CY2020	us-gaap	Inventory Write Down InventoryWriteDown	1647000	USD
CY2019	us-gaap	Inventory Write Down InventoryWriteDown	6015000	USD
CY2018	us-gaap	Inventory Write Down InventoryWriteDown	5628000	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	860000	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	4283000	USD
CY2018	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-6379000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-20929000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-6315000	USD
CY2018	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	24578000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	9132000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	3787000	USD
CY2018	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	20065000	USD
CY2020	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	2261000	USD
CY2019	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-915000	USD
CY2018	us-gaap	Increase Decrease In Prepaid Deferred Expense And Other Assets IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets	-787000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	719000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	-102000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Assets IncreaseDecreaseInOtherNoncurrentAssets	140000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-2206000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	-21290000	USD
CY2018	us-gaap	Increase Decrease In Accounts Payable IncreaseDecreaseInAccountsPayable	13728000	USD
CY2020	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	4292000	USD
CY2019	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	3554000	USD
CY2018	us-gaap	Increase Decrease In Other Accounts Payable And Accrued Liabilities IncreaseDecreaseInOtherAccountsPayableAndAccruedLiabilities	-3374000	USD
CY2020	us-gaap	Increase Decrease In Customer Advances And Deposits IncreaseDecreaseInCustomerAdvancesAndDeposits	-6312000	USD
CY2019	us-gaap	Increase Decrease In Customer Advances And Deposits IncreaseDecreaseInCustomerAdvancesAndDeposits	-127000	USD
CY2018	us-gaap	Increase Decrease In Customer Advances And Deposits IncreaseDecreaseInCustomerAdvancesAndDeposits	9143000	USD
CY2020	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	2422000	USD
CY2019	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-84000	USD
CY2018	us-gaap	Increase Decrease In Other Noncurrent Liabilities IncreaseDecreaseInOtherNoncurrentLiabilities	-682000	USD
CY2020	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-397000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	68031000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	50344000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	151000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	234000	USD
CY2020	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-1427000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-2418000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	126000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	52764000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7225000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8785000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8642000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-20184000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-44668000	USD
CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-8642000	USD
CY2020	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	-15500000	USD
CY2019	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	165000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5042000	USD
CY2018	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	0	USD
CY2020	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	0	USD
CY2019	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	48603000	USD
CY2018	us-gaap	Repayments Of Lines Of Credit RepaymentsOfLinesOfCredit	8800000	USD
CY2020	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	0	USD
CY2019	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	120121000	USD
CY2018	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	18960000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	5276000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1143000	USD
CY2020	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	10020000	USD
CY2019	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9789000	USD
CY2018	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	9538000	USD
CY2020	us-gaap	Repayments Of Debt And Capital Lease Obligations RepaymentsOfDebtAndCapitalLeaseObligations	805000	USD
CY2019	us-gaap	Repayments Of Debt And Capital Lease Obligations RepaymentsOfDebtAndCapitalLeaseObligations	1906000	USD
CY2018	us-gaap	Repayments Of Debt And Capital Lease Obligations RepaymentsOfDebtAndCapitalLeaseObligations	2802000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	1813000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	0	USD
CY2020	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	855000	USD
CY2019	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	935000	USD
CY2018	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	855000	USD
CY2020	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	468000	USD
CY2019	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	216000	USD
CY2018	us-gaap	Proceeds From Stock Options Exercised ProceedsFromStockOptionsExercised	326000	USD
CY2020	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2019	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	148000	USD
CY2018	us-gaap	Payments Of Stock Issuance Costs PaymentsOfStockIssuanceCosts	0	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-30278000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-21271000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-40062000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2302000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	2092000	USD
CY2018	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	1640000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45576000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43484000	USD
CY2017Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	41844000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	47878000	USD
CY2019Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	45576000	USD
CY2018Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43484000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	5549000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	7669000	USD
CY2018	us-gaap	Interest Paid Net InterestPaidNet	7291000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2875000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2005000	USD
CY2018	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1112000	USD
CY2020	cmtl	Reclass Of Finance Lease Right Of Use Assets To Property Plant And Equipment ReclassOfFinanceLeaseRightOfUseAssetsToPropertyPlantAndEquipment	698000	USD
CY2019	cmtl	Reclass Of Finance Lease Right Of Use Assets To Property Plant And Equipment ReclassOfFinanceLeaseRightOfUseAssetsToPropertyPlantAndEquipment	0	USD
CY2018	cmtl	Reclass Of Finance Lease Right Of Use Assets To Property Plant And Equipment ReclassOfFinanceLeaseRightOfUseAssetsToPropertyPlantAndEquipment	0	USD
CY2020	cmtl	Accrual Related To Tax Withholding For Sharebased Compensation AccrualRelatedToTaxWithholdingForSharebasedCompensation	1399000	USD
CY2019	cmtl	Accrual Related To Tax Withholding For Sharebased Compensation AccrualRelatedToTaxWithholdingForSharebasedCompensation	1787000	USD
CY2018	cmtl	Accrual Related To Tax Withholding For Sharebased Compensation AccrualRelatedToTaxWithholdingForSharebasedCompensation	2963000	USD
CY2020	cmtl	Cash Dividend Declared Including Accrual Of Dividend Equivalents CashDividendDeclaredIncludingAccrualOfDividendEquivalents	2762000	USD
CY2019	cmtl	Cash Dividend Declared Including Accrual Of Dividend Equivalents CashDividendDeclaredIncludingAccrualOfDividendEquivalents	2733000	USD
CY2018	cmtl	Cash Dividend Declared Including Accrual Of Dividend Equivalents CashDividendDeclaredIncludingAccrualOfDividendEquivalents	2656000	USD
CY2020	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2019	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	0	USD
CY2018	us-gaap	Capital Lease Obligations Incurred CapitalLeaseObligationsIncurred	1306000	USD
CY2020	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	1408000	USD
CY2019	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	902000	USD
CY2018	us-gaap	Noncash Or Part Noncash Acquisition Fixed Assets Acquired1 NoncashOrPartNoncashAcquisitionFixedAssetsAcquired1	719000	USD
CY2020	cmtl	Forfeiture Issuance Of Restricted Stock Awards ForfeitureIssuanceOfRestrictedStockAwards	0	USD
CY2019	cmtl	Forfeiture Issuance Of Restricted Stock Awards ForfeitureIssuanceOfRestrictedStockAwards	1000	USD
CY2018	cmtl	Forfeiture Issuance Of Restricted Stock Awards ForfeitureIssuanceOfRestrictedStockAwards	-1000	USD
CY2020	us-gaap	Stock Issued1 StockIssued1	11575000	USD
CY2019	us-gaap	Stock Issued1 StockIssued1	5606000	USD
CY2018	us-gaap	Stock Issued1 StockIssued1	0	USD
CY2020	cmtl	Noncash Or Part Noncash Acquisition Accruals NoncashOrPartNoncashAcquisitionAccruals	1157000	USD
CY2019	cmtl	Noncash Or Part Noncash Acquisition Accruals NoncashOrPartNoncashAcquisitionAccruals	0	USD
CY2018	cmtl	Noncash Or Part Noncash Acquisition Accruals NoncashOrPartNoncashAcquisitionAccruals	0	USD
CY2020	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	operating_segment
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2020	us-gaap	Contract With Customer Asset Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerAssetIncreaseDecreaseForContractAcquiredInBusinessCombination	417000	USD
CY2020	us-gaap	Contract With Customer Liability Increase Decrease For Contract Acquired In Business Combination ContractWithCustomerLiabilityIncreaseDecreaseForContractAcquiredInBusinessCombination	6890000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2020	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	34225000	USD
CY2019	us-gaap	Contract With Customer Liability Revenue Recognized ContractWithCustomerLiabilityRevenueRecognized	33139000	USD
CY2020Q3	us-gaap	Revenue Remaining Performance Obligation RevenueRemainingPerformanceObligation	620912000	USD
CY2020Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	47878000	USD
CY2019Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	45576000	USD
CY2020	us-gaap	Research And Development Arrangement Contract To Perform For Others Compensation Earned ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned	11923000	USD
CY2019	us-gaap	Research And Development Arrangement Contract To Perform For Others Compensation Earned ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned	14679000	USD
CY2018	us-gaap	Research And Development Arrangement Contract To Perform For Others Compensation Earned ResearchAndDevelopmentArrangementContractToPerformForOthersCompensationEarned	16924000	USD
CY2020	cmtl	Measurement Of Uncertain Tax Position Percentage That Likelihood Of Tax Benefit Being Realized Upon Ultimate Settlement Must Be Greater Than MeasurementOfUncertainTaxPositionPercentageThatLikelihoodOfTaxBenefitBeingRealizedUponUltimateSettlementMustBeGreaterThan	0.50
CY2020	us-gaap	Weighted Average Number Of Shares Treasury Stock WeightedAverageNumberOfSharesTreasuryStock	0	shares
CY2019	us-gaap	Weighted Average Number Of Shares Treasury Stock WeightedAverageNumberOfSharesTreasuryStock	0	shares
CY2018	us-gaap	Weighted Average Number Of Shares Treasury Stock WeightedAverageNumberOfSharesTreasuryStock	0	shares
CY2020	cmtl	Weighted Average Performance Shares Outstanding During The Period That Are Excludedfrom Eps Calculation WeightedAveragePerformanceSharesOutstandingDuringThePeriodThatAreExcludedfromEPSCalculation	201000	shares
CY2019	cmtl	Weighted Average Performance Shares Outstanding During The Period That Are Excludedfrom Eps Calculation WeightedAveragePerformanceSharesOutstandingDuringThePeriodThatAreExcludedfromEPSCalculation	243000	shares
CY2018	cmtl	Weighted Average Performance Shares Outstanding During The Period That Are Excludedfrom Eps Calculation WeightedAveragePerformanceSharesOutstandingDuringThePeriodThatAreExcludedfromEPSCalculation	258000	shares
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	7020000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	25041000	USD
CY2018	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	29769000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24798000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	24124000	shares
CY2018	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	23825000	shares
CY2020	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	101000	shares
CY2019	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	178000	shares
CY2018	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	215000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24899000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24302000	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	24040000	shares
CY2020	us-gaap	Use Of Estimates UseOfEstimates	Use of EstimatesThe preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amount of assets and liabilities, and disclosure of contingent assets and liabilities, at the date of the consolidated financial statements and the reported amounts of net sales and expenses during the reported period. We make significant estimates in many areas of our accounting, including but not limited to the following: long-term contracts, stock-based compensation, intangible assets and liabilities including goodwill, provision for excess and obsolete inventory, allowance for doubtful accounts, warranty obligations and income taxes. Actual results may differ from those estimates.
CY2020	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	ReclassificationsCertain reclassifications have been made to previously reported consolidated financial statements to conform to the fiscal 2020 presentation.
CY2020Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	128585000	USD
CY2019Q3	us-gaap	Accounts Receivable Gross Current AccountsReceivableGrossCurrent	146899000	USD
CY2020Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1769000	USD
CY2019Q3	us-gaap	Allowance For Doubtful Accounts Receivable Current AllowanceForDoubtfulAccountsReceivableCurrent	1867000	USD
CY2020Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	126816000	USD
CY2019Q3	us-gaap	Accounts Receivable Net Current AccountsReceivableNetCurrent	145032000	USD
CY2020Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	59175000	USD
CY2019Q3	us-gaap	Inventory Raw Materials InventoryRawMaterials	53959000	USD
CY2020Q3	us-gaap	Inventory Finished Goods And Work In Process InventoryFinishedGoodsAndWorkInProcess	42203000	USD
CY2019Q3	us-gaap	Inventory Finished Goods And Work In Process InventoryFinishedGoodsAndWorkInProcess	40576000	USD
CY2020Q3	us-gaap	Inventory Gross InventoryGross	101378000	USD
CY2019Q3	us-gaap	Inventory Gross InventoryGross	94535000	USD
CY2020Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	19076000	USD
CY2019Q3	us-gaap	Inventory Valuation Reserves InventoryValuationReserves	19696000	USD
CY2020Q3	us-gaap	Inventory Net InventoryNet	82302000	USD
CY2019Q3	us-gaap	Inventory Net InventoryNet	74839000	USD
CY2020Q3	cmtl	Inventory Directly Related To Long Term Contracts InventoryDirectlyRelatedToLongTermContracts	7215000	USD
CY2019Q3	cmtl	Inventory Directly Related To Long Term Contracts InventoryDirectlyRelatedToLongTermContracts	4053000	USD
CY2020Q3	cmtl	Inventory Related To Contracts From Third Party Commercial Customers Who Outsource Their Manufacturing To Company InventoryRelatedToContractsFromThirdPartyCommercialCustomersWhoOutsourceTheirManufacturingToCompany	1387000	USD
CY2019Q3	cmtl	Inventory Related To Contracts From Third Party Commercial Customers Who Outsource Their Manufacturing To Company InventoryRelatedToContractsFromThirdPartyCommercialCustomersWhoOutsourceTheirManufacturingToCompany	1513000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	171910000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	174147000	USD
CY2020Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	144873000	USD
CY2019Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	146121000	USD
CY2020Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	27037000	USD
CY2019Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	28026000	USD
CY2020	us-gaap	Depreciation Depreciation	10386000	USD
CY2019	us-gaap	Depreciation Depreciation	11927000	USD
CY2018	us-gaap	Depreciation Depreciation	13655000	USD
CY2020Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	20857000	USD
CY2019Q3	us-gaap	Employee Related Liabilities Current EmployeeRelatedLiabilitiesCurrent	23295000	USD
CY2020Q3	cmtl	Accrued Contract Costs AccruedContractCosts	15306000	USD
CY2019Q3	cmtl	Accrued Contract Costs AccruedContractCosts	15007000	USD
CY2020Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	15200000	USD
CY2019Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	15968000	USD
CY2020Q3	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	2539000	USD
CY2019Q3	us-gaap	Accrued Professional Fees Current AccruedProfessionalFeesCurrent	2835000	USD
CY2020Q3	cmtl	Accrued Commissions And Royalties Current AccruedCommissionsAndRoyaltiesCurrent	4621000	USD
CY2019Q3	cmtl	Accrued Commissions And Royalties Current AccruedCommissionsAndRoyaltiesCurrent	5114000	USD
CY2020Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	26581000	USD
CY2019Q3	us-gaap	Other Accrued Liabilities Current OtherAccruedLiabilitiesCurrent	16365000	USD
CY2020Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	85104000	USD
CY2019Q3	us-gaap	Accrued Liabilities Current AccruedLiabilitiesCurrent	78584000	USD
CY2020	cmtl	Minimum Coverage Period Of Product Warranty From Date Of Shipment MinimumCoveragePeriodOfProductWarrantyFromDateOfShipment	P1Y
CY2019Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	15968000	USD
CY2018Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	11738000	USD
CY2020	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	2277000	USD
CY2019	us-gaap	Product Warranty Accrual Warranties Issued ProductWarrantyAccrualWarrantiesIssued	3902000	USD
CY2020	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	1000000	USD
CY2019	us-gaap	Product Warranty Accrual Additions From Business Acquisition ProductWarrantyAccrualAdditionsFromBusinessAcquisition	6431000	USD
CY2020	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	4347000	USD
CY2019	us-gaap	Product Warranty Accrual Payments ProductWarrantyAccrualPayments	6151000	USD
CY2020	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	302000	USD
CY2019	us-gaap	Product Warranty Accrual Preexisting Increase Decrease ProductWarrantyAccrualPreexistingIncreaseDecrease	1727000	USD
CY2020Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	15200000	USD
CY2019Q3	us-gaap	Product Warranty Accrual Classified Current ProductWarrantyAccrualClassifiedCurrent	15968000	USD
CY2019Q3	us-gaap	Operating Lease Liability Current OperatingLeaseLiabilityCurrent	568000	USD
CY2019Q3	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	35825000	USD
CY2019Q3	us-gaap	Deferred Rent Credit DeferredRentCredit	3023000	USD
CY2019Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	38848000	USD
CY2020	us-gaap	Finance Lease Right Of Use Asset Amortization FinanceLeaseRightOfUseAssetAmortization	175000	USD
CY2020	us-gaap	Finance Lease Interest Expense FinanceLeaseInterestExpense	4000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	10728000	USD
CY2020	us-gaap	Short Term Lease Cost ShortTermLeaseCost	3045000	USD
CY2020	us-gaap	Variable Lease Cost VariableLeaseCost	4033000	USD
CY2020	us-gaap	Sublease Income SubleaseIncome	22000	USD
CY2020	us-gaap	Lease Cost LeaseCost	17963000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	11437000	USD
CY2020	us-gaap	Finance Lease Interest Payment On Liability FinanceLeaseInterestPaymentOnLiability	4000	USD
CY2020	us-gaap	Finance Lease Principal Payments FinanceLeasePrincipalPayments	322000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	3561000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	9373000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Next Twelve Months FinanceLeaseLiabilityPaymentsDueNextTwelveMonths	60000	USD
CY2020Q3	cmtl	Lease Liability To Be Paid Year One LeaseLiabilityToBePaidYearOne	9433000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	7929000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Two FinanceLeaseLiabilityPaymentsDueYearTwo	0	USD
CY2020Q3	cmtl	Lease Liability To Be Paid Year Two LeaseLiabilityToBePaidYearTwo	7929000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	6251000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Three FinanceLeaseLiabilityPaymentsDueYearThree	0	USD
CY2020Q3	cmtl	Lease Liability To Be Paid Year Three LeaseLiabilityToBePaidYearThree	6251000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	4881000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Four FinanceLeaseLiabilityPaymentsDueYearFour	0	USD
CY2020Q3	cmtl	Lease Liability To Be Paid Year Four LeaseLiabilityToBePaidYearFour	4881000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	4215000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due Year Five FinanceLeaseLiabilityPaymentsDueYearFive	0	USD
CY2020Q3	cmtl	Lease Liability To Be Paid Year Five LeaseLiabilityToBePaidYearFive	4215000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	2798000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due After Year Five FinanceLeaseLiabilityPaymentsDueAfterYearFive	0	USD
CY2020Q3	cmtl	Lease Liability To Be Paid After Year Five LeaseLiabilityToBePaidAfterYearFive	2798000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	35447000	USD
CY2020Q3	cmtl	Lease Liability LeaseLiability	32413000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	11812000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due Current CapitalLeasesFutureMinimumPaymentsDueCurrent	789000	USD
CY2020Q3	us-gaap	Finance Lease Liability Payments Due FinanceLeaseLiabilityPaymentsDue	60000	USD
CY2020Q3	cmtl	Lease Liability Payment Due LeaseLiabilityPaymentDue	35507000	USD
CY2020Q3	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	3091000	USD
CY2020Q3	us-gaap	Finance Lease Liability Undiscounted Excess Amount FinanceLeaseLiabilityUndiscountedExcessAmount	3000	USD
CY2020Q3	cmtl	Lease Liability Undiscounted Excess Amount LeaseLiabilityUndiscountedExcessAmount	3094000	USD
CY2020Q3	us-gaap	Operating Lease Liability OperatingLeaseLiability	32356000	USD
CY2020Q3	us-gaap	Finance Lease Liability FinanceLeaseLiability	57000	USD
CY2020Q3	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y6M10D
CY2020Q3	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P1Y9M29D
CY2020Q3	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.0404
CY2020Q3	us-gaap	Finance Lease Weighted Average Discount Rate Percent FinanceLeaseWeightedAverageDiscountRatePercent	0.0637
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due Next Twelve Months OperatingAndCapitalLeasesFutureMinimumPaymentsDueNextTwelveMonths	12601000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	8723000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Two Years CapitalLeasesFutureMinimumPaymentsDueInTwoYears	0	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due In Two Years OperatingAndCapitalLeasesFutureMinimumPaymentsDueInTwoYears	8723000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	7343000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Three Years CapitalLeasesFutureMinimumPaymentsDueInThreeYears	0	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due In Three Years OperatingAndCapitalLeasesFutureMinimumPaymentsDueInThreeYears	7343000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	5776000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Four Years CapitalLeasesFutureMinimumPaymentsDueInFourYears	0	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due In Four Years OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFourYears	5776000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	3430000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due In Five Years CapitalLeasesFutureMinimumPaymentsDueInFiveYears	0	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due In Five Years OperatingAndCapitalLeasesFutureMinimumPaymentsDueInFiveYears	3430000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	7130000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due Thereafter CapitalLeasesFutureMinimumPaymentsDueThereafter	0	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due Thereafter OperatingAndCapitalLeasesFutureMinimumPaymentsDueThereafter	7130000	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1715000	USD
CY2019Q3	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	44214000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Due CapitalLeasesFutureMinimumPaymentsDue	789000	USD
CY2019Q3	cmtl	Operating And Capital Leases Future Minimum Payments Due OperatingAndCapitalLeasesFutureMinimumPaymentsDue	45003000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	32000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Interest Included In Payments CapitalLeasesFutureMinimumPaymentsInterestIncludedInPayments	32000	USD
CY2019Q3	us-gaap	Capital Leases Future Minimum Payments Present Value Of Net Minimum Payments CapitalLeasesFutureMinimumPaymentsPresentValueOfNetMinimumPayments	757000	USD
CY2019Q3	cmtl	Operating Leases Future Minimum Payments Due And Capital Leases Future Minimum Payments Present Valueof Net Minimum Payments OperatingLeasesFutureMinimumPaymentsDueAndCapitalLeasesFutureMinimumPaymentsPresentValueofNetMinimumPayments	44971000	USD
CY2018	us-gaap	Other Tax Expense Benefit OtherTaxExpenseBenefit	-11792000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.270
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.270
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	7226000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	28813000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	22243000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	2084000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	97000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	2383000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9310000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	28910000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	24626000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1053000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-2190000	USD
CY2018	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	367000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	721000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	4782000	USD
CY2018	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	-7499000	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	1137000	USD
CY2018	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	440000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1312000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-321000	USD
CY2018	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	1115000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	298000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	62000	USD
CY2018	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	429000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	393000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	-179000	USD
CY2018	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	5000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2290000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3869000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5143000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	1955000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6071000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.210
CY2018	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6615000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.270
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-278000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.030
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	967000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.033
CY2018	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1193000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.048
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	308000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	0.033
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-44000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.001
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-1112000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.045
CY2020	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	1210000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.130
CY2019	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	1129000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.039
CY2018	us-gaap	Income Tax Reconciliation Tax Credits Research IncomeTaxReconciliationTaxCreditsResearch	678000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Credits Research EffectiveIncomeTaxRateReconciliationTaxCreditsResearch	0.028
CY2020	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income Amount EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncomeAmount	162000	USD
CY2020	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncome	0.017
CY2019	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income Amount EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncomeAmount	632000	USD
CY2019	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncome	0.022
CY2018	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income Amount EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncomeAmount	0	USD
CY2018	cmtl	Effective Income Tax Rate Reconciliation Deduction Foreign Derived Intangible Income EffectiveIncomeTaxRateReconciliationDeductionForeignDerivedIntangibleIncome	0
CY2020	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	301000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.032
CY2019	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	394000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0.014
CY2018	us-gaap	Income Tax Reconciliation Nondeductible Expense Other IncomeTaxReconciliationNondeductibleExpenseOther	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Other EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther	0
CY2020	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	595000	USD
CY2020	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationPercent	0.064
CY2019	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	330000	USD
CY2019	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationPercent	0.011
CY2018	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationAmount	-22000	USD
CY2018	cmtl	Effective Income Tax Rate Reconciliation Nondeductible Expense Executive Compensation Percent EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensationPercent	-0.001
CY2020	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties EffectiveIncomeTaxRateReconciliationFinesAndPenalties	189000	USD
CY2020	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties Percent EffectiveIncomeTaxRateReconciliationFinesAndPenaltiesPercent	0.020
CY2019	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties EffectiveIncomeTaxRateReconciliationFinesAndPenalties	2000	USD
CY2019	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties Percent EffectiveIncomeTaxRateReconciliationFinesAndPenaltiesPercent	0
CY2018	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties EffectiveIncomeTaxRateReconciliationFinesAndPenalties	1000	USD
CY2018	cmtl	Effective Income Tax Rate Reconciliation Fines And Penalties Percent EffectiveIncomeTaxRateReconciliationFinesAndPenaltiesPercent	0
CY2020	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	1000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0
CY2019	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	-2081000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	-0.072
CY2018	us-gaap	Income Tax Reconciliation Tax Settlements IncomeTaxReconciliationTaxSettlements	0	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Tax Settlements EffectiveIncomeTaxRateReconciliationTaxSettlements	0
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-135000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.015
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	0	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	0
CY2018	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	-11317000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate EffectiveIncomeTaxRateReconciliationChangeInEnactedTaxRate	-0.460
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	453000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.049
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	5000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2018	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-221000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	-0.009
CY2020	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	273000	USD
CY2020	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.030
CY2019	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-14000	USD
CY2019	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2018	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	398000	USD
CY2018	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0.015
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2290000	USD
CY2020	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.246
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3869000	USD
CY2019	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.134
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5143000	USD
CY2018	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.210
CY2020Q3	cmtl	Deferred Tax Assets Inventory And Warranty Reserves DeferredTaxAssetsInventoryAndWarrantyReserves	5786000	USD
CY2019Q3	cmtl	Deferred Tax Assets Inventory And Warranty Reserves DeferredTaxAssetsInventoryAndWarrantyReserves	7318000	USD
CY2020Q3	cmtl	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation And Commissions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndCommissions	3210000	USD
CY2019Q3	cmtl	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Employee Compensation And Commissions DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensationAndCommissions	3548000	USD
CY2020Q3	cmtl	Deferred Tax Assets Contract With Customer Liability DeferredTaxAssetsContractWithCustomerLiability	0	USD
CY2019Q3	cmtl	Deferred Tax Assets Contract With Customer Liability DeferredTaxAssetsContractWithCustomerLiability	5331000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	19656000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Research DeferredTaxAssetsTaxCreditCarryforwardsResearch	18183000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	4955000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	12568000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	41778000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Tax Deferred Expense Compensation And Benefits Share Based Compensation Cost DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost	5817000	USD
CY2020Q3	cmtl	Deferred Tax Assets Foreign Scientific Research And Experimental Development Costs DeferredTaxAssetsForeignScientificResearchAndExperimentalDevelopmentCosts	1765000	USD
CY2019Q3	cmtl	Deferred Tax Assets Foreign Scientific Research And Experimental Development Costs DeferredTaxAssetsForeignScientificResearchAndExperimentalDevelopmentCosts	1689000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	3942000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	6248000	USD
CY2020Q3	cmtl	Deferred Tax Assets Operating Lease Liabilities DeferredTaxAssetsOperatingLeaseLiabilities	7335000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	6600000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Other DeferredTaxAssetsOther	9012000	USD
CY2020Q3	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	11471000	USD
CY2019Q3	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	44578000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	801000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	1362000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	7080000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	50368000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets	54612000	USD
CY2020Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	58249000	USD
CY2019Q3	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	55974000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	16471000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	11396000	USD
CY2020Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	16471000	USD
CY2019Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	11396000	USD
CY2020Q3	cmtl	Future Minimum Taxable Income To Fully Utilize Net Deferred Tax Asset FutureMinimumTaxableIncomeToFullyUtilizeNetDeferredTaxAsset	174900000	USD
CY2020Q3	cmtl	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	8345000	USD
CY2019Q3	cmtl	Unrecognized Tax Benefits Including Interest UnrecognizedTaxBenefitsIncludingInterest	7215000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	75000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	12000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	7700000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	6670000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	73000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9137000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	7203000	USD
CY2018Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	9137000	USD
CY2017Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8586000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	684000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	893000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	645000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	464000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	17000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	49000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	394000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	81000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	8000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	2450000	USD
CY2018	us-gaap	Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions	62000	USD
CY2020Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	8270000	USD
CY2019Q3	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	7203000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9275000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11427000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8569000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2042000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2553000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2005000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	7233000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	8874000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	6564000	USD
CY2020Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	9677000	USD
CY2020Q3	cmtl	Estimated Forfeitures Related To Total Unrecognized Stock Based Compensation Cost EstimatedForfeituresRelatedToTotalUnrecognizedStockBasedCompensationCost	883000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P3Y2M12D
CY2020Q3	cmtl	Stock Based Compensation Cost Capitalized In Ending Inventory StockBasedCompensationCostCapitalizedInEndingInventory	48000	USD
CY2019Q3	cmtl	Stock Based Compensation Cost Capitalized In Ending Inventory StockBasedCompensationCostCapitalizedInEndingInventory	48000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9275000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11427000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8569000	USD
CY2020	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2042000	USD
CY2019	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2553000	USD
CY2018	us-gaap	Employee Service Share Based Compensation Tax Benefit From Compensation Expense EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense	2005000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	7233000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	8874000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense Net Of Tax AllocatedShareBasedCompensationExpenseNetOfTax	6564000	USD
CY2020	cmtl	Stock Issued During The Period Shares Net Settlement Of Stock Based Awards StockIssuedDuringThePeriodSharesNetSettlementOfStockBasedAwards	27994	shares
CY2019	cmtl	Stock Issued During The Period Shares Net Settlement Of Stock Based Awards StockIssuedDuringThePeriodSharesNetSettlementOfStockBasedAwards	9345	shares
CY2018	cmtl	Stock Issued During The Period Shares Net Settlement Of Stock Based Awards StockIssuedDuringThePeriodSharesNetSettlementOfStockBasedAwards	8706	shares
CY2020	cmtl	Income Tax Benefit From Settlementof Stock Based Awards IncomeTaxBenefitFromSettlementofStockBasedAwards	224000	USD
CY2019	cmtl	Income Tax Benefit From Settlementof Stock Based Awards IncomeTaxBenefitFromSettlementofStockBasedAwards	479000	USD
CY2018	cmtl	Income Tax Benefit From Settlementof Stock Based Awards IncomeTaxBenefitFromSettlementofStockBasedAwards	1193000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	15174000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2290000	USD
CY2020	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	190000	USD
CY2020	us-gaap	Interest Expense InterestExpense	6054000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9275000	USD
CY2020	cmtl	Long Lived Assets Acquired Including Property Plant And Equipment Intangible Assets And Goodwill LongLivedAssetsAcquiredIncludingPropertyPlantAndEquipmentIntangibleAssetsAndGoodwill	38451000	USD
CY2020Q3	us-gaap	Assets Assets	929647000	USD
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	9275000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21595000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	10561000	USD
CY2020	cmtl	Contract Settlement Costs ContractSettlementCosts	444000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	20754000	USD
CY2020	cmtl	Adjusted Earnings Losses Before Interest Taxes Depreciation And Amortization AdjustedEarningsLossesBeforeInterestTaxesDepreciationAndAmortization	77803000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	7225000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	41407000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	3869000	USD
CY2019	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-35000	USD
CY2019	us-gaap	Interest Expense InterestExpense	9245000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11427000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18320000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	11927000	USD
CY2019	cmtl	Contract Settlement Costs ContractSettlementCosts	6351000	USD
CY2019	cmtl	Settlement Of Intellectual Property Litigation SettlementOfIntellectualPropertyLitigation	3204000	USD
CY2019	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	5871000	USD
CY2019	us-gaap	Business Exit Costs1 BusinessExitCosts1	1373000	USD
CY2019	cmtl	Adjusted Earnings Losses Before Interest Taxes Depreciation And Amortization AdjustedEarningsLossesBeforeInterestTaxesDepreciationAndAmortization	93472000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8785000	USD
CY2019	cmtl	Long Lived Assets Acquired Including Property Plant And Equipment Intangible Assets And Goodwill LongLivedAssetsAcquiredIncludingPropertyPlantAndEquipmentIntangibleAssetsAndGoodwill	60693000	USD
CY2019Q3	us-gaap	Assets Assets	887711000	USD
CY2018	us-gaap	Revenues Revenues	570589000	USD
CY2018	us-gaap	Operating Income Loss OperatingIncomeLoss	35075000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-5143000	USD
CY2018	us-gaap	Interest Income Expense Net InterestIncomeExpenseNet	-254000	USD
CY2018	us-gaap	Interest Expense InterestExpense	10195000	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	8569000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	160214000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	258019000	USD
CY2018Q3	us-gaap	Assets Assets	845157000	USD
CY2020	us-gaap	Business Combination Acquisition Related Costs BusinessCombinationAcquisitionRelatedCosts	20754000	USD
CY2019	us-gaap	Write Off Of Deferred Debt Issuance Cost WriteOffOfDeferredDebtIssuanceCost	3217000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21075000	USD
CY2018	us-gaap	Depreciation And Amortization DepreciationAndAmortization	13655000	USD
CY2018	cmtl	Adjusted Earnings Losses Before Interest Taxes Depreciation And Amortization AdjustedEarningsLossesBeforeInterestTaxesDepreciationAndAmortization	78374000	USD
CY2018	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	8642000	USD
CY2019Q3	us-gaap	Goodwill Goodwill	310489000	USD
CY2020Q3	us-gaap	Goodwill Goodwill	330519000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	operating_segment
CY2020Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	418233000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Gross FiniteLivedIntangibleAssetsGross	400509000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	138619000	USD
CY2019Q3	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	261890000	USD
CY2020	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21595000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	18320000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	21075000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths	21276000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Two FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo	19648000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Three FiniteLivedIntangibleAssetsAmortizationExpenseYearThree	19648000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Four FiniteLivedIntangibleAssetsAmortizationExpenseYearFour	19021000	USD
CY2020Q3	us-gaap	Finite Lived Intangible Assets Amortization Expense Year Five FiniteLivedIntangibleAssetsAmortizationExpenseYearFive	18918000	USD
CY2018Q4	cmtl	Aggregate Registered Amount Available For Sale Of Securities Under Shelf Registration State Additional Amount AggregateRegisteredAmountAvailableForSaleOfSecuritiesUnderShelfRegistrationStateAdditionalAmount	400000000	USD
CY2018Q4	cmtl	Aggregate Registered Amount Available For Sale Of Securities Under Shelf Registration State Additional Amount AggregateRegisteredAmountAvailableForSaleOfSecuritiesUnderShelfRegistrationStateAdditionalAmount	400000000	USD
CY2020Q3	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	8664000	USD
CY2020Q2	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.10
CY2020Q1	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.10
CY2020Q2	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2020Q3	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	100000000	USD
CY2019	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2020	us-gaap	Treasury Stock Shares Acquired TreasuryStockSharesAcquired	0	shares
CY2019Q4	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2019Q4	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.10
CY2019Q3	us-gaap	Dividends Payable Amount Per Share DividendsPayableAmountPerShare	0.10
CY2020Q1	us-gaap	Common Stock Dividends Per Share Cash Paid CommonStockDividendsPerShareCashPaid	0.10
CY2019Q4	us-gaap	Revenues Revenues	170267000	USD
CY2020Q1	us-gaap	Revenues Revenues	161654000	USD
CY2020Q2	us-gaap	Revenues Revenues	135121000	USD
CY2020Q3	us-gaap	Revenues Revenues	149673000	USD
CY2020	us-gaap	Revenues Revenues	616715000	USD
CY2019Q4	us-gaap	Gross Profit GrossProfit	63567000	USD
CY2020Q2	us-gaap	Gross Profit GrossProfit	53001000	USD
CY2020Q3	us-gaap	Gross Profit GrossProfit	49663000	USD
CY2020Q1	us-gaap	Gross Profit GrossProfit	60602000	USD
CY2020	us-gaap	Gross Profit GrossProfit	226833000	USD
CY2019Q4	us-gaap	Net Income Loss NetIncomeLoss	6388000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	3495000	USD
CY2020Q2	us-gaap	Net Income Loss NetIncomeLoss	-3989000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	1126000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	7020000	USD
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.26
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.16
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.04
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2018Q4	us-gaap	Revenues Revenues	160844000	USD
CY2019Q1	us-gaap	Revenues Revenues	164133000	USD
CY2019	us-gaap	Gross Profit GrossProfit	247440000	USD
CY2019Q2	us-gaap	Revenues Revenues	170448000	USD
CY2018Q4	us-gaap	Net Income Loss NetIncomeLoss	3468000	USD
CY2018Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.14
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.32
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	7826000	USD
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2019Q3	us-gaap	Revenues Revenues	176372000	USD
CY2019	us-gaap	Revenues Revenues	671797000	USD
CY2018Q4	us-gaap	Gross Profit GrossProfit	57769000	USD
CY2019Q1	us-gaap	Gross Profit GrossProfit	61245000	USD
CY2019Q2	us-gaap	Gross Profit GrossProfit	64416000	USD
CY2019Q3	us-gaap	Gross Profit GrossProfit	64010000	USD
CY2019Q2	us-gaap	Net Income Loss NetIncomeLoss	7612000	USD
CY2019Q3	us-gaap	Net Income Loss NetIncomeLoss	6135000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	25041000	USD
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.03
CY2017Q4	us-gaap	Revenues Revenues	121569000	USD
CY2018Q2	us-gaap	Net Income Loss NetIncomeLoss	8210000	USD
CY2018Q3	us-gaap	Net Income Loss NetIncomeLoss	7458000	USD
CY2018	us-gaap	Gross Profit GrossProfit	223941000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	29769000	USD
CY2018Q1	us-gaap	Revenues Revenues	133731000	USD
CY2018Q2	us-gaap	Revenues Revenues	147854000	USD
CY2018Q3	us-gaap	Revenues Revenues	167435000	USD
CY2018	us-gaap	Revenues Revenues	570589000	USD
CY2017Q4	us-gaap	Gross Profit GrossProfit	47716000	USD
CY2018Q1	us-gaap	Gross Profit GrossProfit	50801000	USD
CY2018Q2	us-gaap	Gross Profit GrossProfit	62436000	USD
CY2018Q3	us-gaap	Gross Profit GrossProfit	62988000	USD
CY2017Q4	us-gaap	Net Income Loss NetIncomeLoss	-1660000	USD
CY2018Q1	us-gaap	Net Income Loss NetIncomeLoss	15761000	USD
CY2017Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.07
CY2018Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.66
CY2018Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.34
CY2018Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.24

Files In Submission

Name	View Source	Status
0000023197-20-000127-index-headers.html	Edgar Link	pending
0000023197-20-000127-index.html	Edgar Link	pending
0000023197-20-000127.txt	Edgar Link	pending
0000023197-20-000127-xbrl.zip	Edgar Link	pending
cmtl-20200731.htm	Edgar Link	pending
cmtl-20200731.xsd	Edgar Link	pending
cmtl-20200731_cal.xml	Edgar Link	unprocessable
cmtl-20200731_def.xml	Edgar Link	unprocessable
cmtl-20200731_g1.jpg	Edgar Link	pending
cmtl-20200731_g2.jpg	Edgar Link	pending
cmtl-20200731_g3.jpg	Edgar Link	pending
cmtl-20200731_htm.xml	Edgar Link	completed
cmtl-20200731_lab.xml	Edgar Link	unprocessable
cmtl-20200731_pre.xml	Edgar Link	unprocessable
deloittelogoa0911.jpg	Edgar Link	pending
exhibit10c-2000stockin.htm	Edgar Link	pending
exhibit10d3-formofstoc.htm	Edgar Link	pending
exhibit21fy20.htm	Edgar Link	pending
exhibit231fy20.htm	Edgar Link	pending
exhibit311fy20.htm	Edgar Link	pending
exhibit312fy20.htm	Edgar Link	pending
exhibit321fy20.htm	Edgar Link	pending
exhibit322fy20.htm	Edgar Link	pending
exhibit4adescriptionof.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$CMTL
COMTECH TELECOMMUNICATIONS CORP /DE/ Stock $cmtl

2020 Q3 Form 10-K Financial Statement

#000002319720000127 Filed on September 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMTL COMTECH TELECOMMUNICATIONS CORP /DE/ Stock $cmtl

2020 Q3 Form 10-K Financial Statement

#000002319720000127 Filed on September 29, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$CMTL
COMTECH TELECOMMUNICATIONS CORP /DE/ Stock $cmtl