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SEGMENT INFORMATION AND GEOGRAPHIC DATA, Data by Geographic Area (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Net sales [Abstract]    
Net sales $ 25,640,649us-gaap_SalesRevenueGoodsNet $ 28,487,187us-gaap_SalesRevenueGoodsNet
Property and Equipment, Net [Member]    
Assets by geographical area [Abstract]    
Total 1,859,355us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
1,717,692us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
Intangible Assets, Net [Member]    
Assets by geographical area [Abstract]    
Total 216,947us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
325,867us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
Reportable Geographical Components [Member] | United States [Member]    
Net sales [Abstract]    
Net sales 22,101,974us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
20,684,397us-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 1,859,355us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_PropertyAndEquipmentNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
1,717,692us-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 39,050us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= country_US
70,830us-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 3,538,675us-gaap_SalesRevenueGoodsNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
7,802,790us-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 $ 177,897us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember
$ 255,037us-gaap_NoncurrentAssets
/ us-gaap_BalanceSheetLocationAxis
= cthr_IntangibleAssetsNetMember
/ us-gaap_ConsolidationItemsAxis
= us-gaap_ReportableGeographicalComponentsMember
/ us-gaap_StatementGeographicalAxis
= cthr_InternationalMember