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Concentrations and Risks (Details Textual) (USD $)
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3 Months Ended |
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Mar. 31, 2015
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Mar. 31, 2014
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Dec. 31, 2014
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| Concentrations and Risks (Textual) |
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| Allowance for doubtful accounts |
1,670,345us-gaap_AllowanceForDoubtfulAccountsReceivable |
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$ 1,787,282us-gaap_AllowanceForDoubtfulAccountsReceivable |
| Wholesale Business [Member] | Raw Materials [Member] |
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| Concentrations and Risks (Textual) |
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| Concentration Risk, Percentage |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
|
| Wholesale Business [Member] | Finished Goods [Member] | Manufacturer One [Member] |
|
|
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| Concentrations and Risks (Textual) |
|
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| Concentration Risk, Percentage |
11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_ManufacturerOneMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
17.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_ManufacturerOneMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
|
| Wholesale Business [Member] | Finished Goods [Member] | Manufacturer Two [Member] |
|
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| Concentrations and Risks (Textual) |
|
|
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| Concentration Risk, Percentage |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_ManufacturerTwoMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_ManufacturerTwoMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
|
| Wholesale Business [Member] | Finished Goods [Member] | Manufacturer Three [Member] |
|
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| Concentrations and Risks (Textual) |
|
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| Concentration Risk, Percentage |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_ManufacturerThreeMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
|
|
| Wholesale Business [Member] | Revenues [Member] | Customer One [Member] |
|
|
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| Concentrations and Risks (Textual) |
|
|
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| Number of wholesale customer |
2evk_NumberOfWholesaleCustomer
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerOneMember |
2evk_NumberOfWholesaleCustomer
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerOneMember |
|
| Concentration Risk, Percentage |
15.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerOneMember |
14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerOneMember |
|
| Wholesale Business [Member] | Revenues [Member] | Customer Two [Member] |
|
|
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| Concentrations and Risks (Textual) |
|
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| Number of wholesale customer |
2evk_NumberOfWholesaleCustomer
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerTwoMember |
2evk_NumberOfWholesaleCustomer
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerTwoMember |
|
| Concentration Risk, Percentage |
14.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerTwoMember |
11.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByBenchmarkAxis
= us-gaap_SalesRevenueNetMember
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_WholesaleBusinessMember
/ us-gaap_MajorCustomersAxis
= evk_CustomerTwoMember |
|
| Retail Business [Member] | Raw Materials [Member] |
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| Concentrations and Risks (Textual) |
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| Number of raw materials suppliers |
1evk_NumberOfRawMaterialsSuppliers
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
1evk_NumberOfRawMaterialsSuppliers
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
|
| Concentration Risk, Percentage |
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
12.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= us-gaap_PublicUtilitiesInventoryRawMaterialsMember |
|
| Retail Business [Member] | Finished Goods [Member] |
|
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| Concentrations and Risks (Textual) |
|
|
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| Concentration Risk, Percentage |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
10.00%us-gaap_ConcentrationRiskPercentage1
/ us-gaap_ConcentrationRiskByTypeAxis
= evk_RetailBusinessMember
/ us-gaap_PublicUtilitiesInventoryAxis
= evk_FinishedGoodsMember |
|