Quarterly report pursuant to Section 13 or 15(d)

6. INTANGIBLE ASSETS, NET (Details)

v2.4.1.9
6. INTANGIBLE ASSETS, NET (Details) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Intangible assets, gross $ 4,110,000us-gaap_FiniteLivedIntangibleAssetsGross $ 4,110,000us-gaap_FiniteLivedIntangibleAssetsGross
Accumulated amortization 1,780,500us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization 1,575,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Intangible assets, net 2,329,500us-gaap_FiniteLivedIntangibleAssetsNet 2,535,000us-gaap_FiniteLivedIntangibleAssetsNet
Vendor relationships    
Intangible assets, gross 1,170,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
1,170,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
Accumulated amortization 507,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
448,000us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
Intangible assets, net 663,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
722,000us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= canv_VendorRelationshipsMember
Trade name    
Intangible assets, gross 230,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
230,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Accumulated amortization 99,667us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
88,167us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Intangible assets, net 130,333us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
141,833us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_TradeNamesMember
Noncompete Agreement    
Intangible assets, gross 2,710,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
2,710,000us-gaap_FiniteLivedIntangibleAssetsGross
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Accumulated amortization 1,173,833us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
1,038,833us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
Intangible assets, net $ 1,536,167us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember
$ 1,671,167us-gaap_FiniteLivedIntangibleAssetsNet
/ us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis
= us-gaap_NoncompeteAgreementsMember