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SEGMENT INFORMATION AND GEOGRAPHIC DATA, Data by Geographic Area (Details) (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Net sales [Abstract]      
Net sales $ 8,377,064us-gaap_SalesRevenueGoodsNet $ 6,067,553us-gaap_SalesRevenueGoodsNet  
Property and Equipment, Net [Member]      
Assets by geographical area [Abstract]      
Total 1,800,466us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
  1,859,355us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
Intangible Assets, Net [Member]      
Assets by geographical area [Abstract]      
Total 180,701us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
  216,947us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
Reportable Geographical Components [Member] | United States [Member]      
Net sales [Abstract]      
Net sales 7,762,346us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
5,709,033us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
 
Reportable Geographical Components [Member] | United States [Member] | Property and Equipment, Net [Member]      
Assets by geographical area [Abstract]      
Total 1,800,466us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
  1,859,355us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
Reportable Geographical Components [Member] | United States [Member] | Intangible Assets, Net [Member]      
Assets by geographical area [Abstract]      
Total 31,907us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
  39,050us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
Reportable Geographical Components [Member] | International [Member]      
Net sales [Abstract]      
Net sales 614,718us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
358,520us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
 
Reportable Geographical Components [Member] | International [Member] | Property and Equipment, Net [Member]      
Assets by geographical area [Abstract]      
Total 0us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
  0us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
Reportable Geographical Components [Member] | International [Member] | Intangible Assets, Net [Member]      
Assets by geographical area [Abstract]      
Total $ 148,794us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
  $ 177,897us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember