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Commitments and Contingencies - Additional Information (Detail)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Concentration Risk [Line Items]      
Number of customers accounted for sale 10cix_ConcentrationRiskNumberOfCustomer    
Customer Concentration Risk | Net Sales | Ten Largest Customers      
Concentration Risk [Line Items]      
Sales Revenue, percentage 47.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_TenLargestCustomersMember
42.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_TenLargestCustomersMember
38.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_TenLargestCustomersMember
Customer Concentration Risk | Net Sales | United States Postal Service | Security Products      
Concentration Risk [Line Items]      
Sales Revenue, percentage 13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_UnitedStatesPostalServiceMember
/ us-gaap_StatementBusinessSegmentsAxis
= cix_SecurityProductsMember
13.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_UnitedStatesPostalServiceMember
/ us-gaap_StatementBusinessSegmentsAxis
= cix_SecurityProductsMember
 
Customer Concentration Risk | Net Sales | Harley Davidson Inc | Security Products      
Concentration Risk [Line Items]      
Sales Revenue, percentage 12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_HarleyDavidsonIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= cix_SecurityProductsMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_HarleyDavidsonIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= cix_SecurityProductsMember
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cix_HarleyDavidsonIncMember
/ us-gaap_StatementBusinessSegmentsAxis
= cix_SecurityProductsMember