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MAJOR CUSTOMERS AND CONCENTRATION OF CREDIT RISK (Details)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Concentration Risk [Line Items]    
Number of Customers 1cthr_NumberOfCustomers 1cthr_NumberOfCustomers
Customer 2 [Member]    
Concentration Risk [Line Items]    
Number of Customers 1cthr_NumberOfCustomers
/ us-gaap_MajorCustomersAxis
= cthr_CustomerTwoMember		  
Trade Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer 1 [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 28.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerOneMember		 21.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerOneMember
Trade Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer 2 [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_AccountsReceivableMember
/ us-gaap_ConcentrationRiskByTypeAxis
= us-gaap_CustomerConcentrationRiskMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerTwoMember		  
Total Gross Sales [Member]    
Concentration Risk [Line Items]    
Percentage of gross sales used as benchmark (in hundredths) 10.00%cthr_PercentageOfGrossSalesUsedAsBenchmark
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember		  
Total Gross Sales [Member] | Customer A [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 28.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerMember		 19.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerMember
Total Gross Sales [Member] | Customer B [Member]    
Concentration Risk [Line Items]    
Concentration risk, percentage (in hundredths) 10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerBMember		 9.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueGoodsNetMember
/ us-gaap_MajorCustomersAxis
= cthr_CustomerBMember