Interest income, Related Party.

No definition available.

Name:	evk_InterestIncomeRelatedParty
Namespace Prefix:	evk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Loans and Leases Receivable, Related Parties, Interest Rate.

+ References

No definition available.

+ Details

Name:	evk_LoansAndLeasesReceivableRelatedPartiesInterestRate
Namespace Prefix:	evk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of receivables settled during period.

+ References

No definition available.

+ Details

Name:	evk_PercentageOfReceivablesSettledDuringPeriod
Namespace Prefix:	evk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Purchase of raw materials from Related Party.

+ References

No definition available.

+ Details

Name:	evk_PurchaseOfRawMaterialsFromRelatedParty
Namespace Prefix:	evk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Related party, account settlement period, maximum.

+ References

No definition available.

+ Details

Name:	evk_RelatedPartyAccountSettlementPeriodMaximum
Namespace Prefix:	evk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Related party, account settlement period, minimum.

+ References

No definition available.

+ Details

Name:	evk_RelatedPartyAccountSettlementPeriodMinimum
Namespace Prefix:	evk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	evk_RelatedPartyTransactionsTextualAbstract
Namespace Prefix:	evk_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Service fee in percentage of export sales manufactured in home country.

+ References

No definition available.

+ Details

Name:	evk_ServiceFeeInPercentageOfExportSalesManufacturedInHomeCountry
Namespace Prefix:	evk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Service fee in percentage of export sales manufactured overseas.

+ References

No definition available.

+ Details

Name:	evk_ServiceFeeInPercentageOfExportSalesManufacturedOverseas
Namespace Prefix:	evk_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

For an unclassified balance sheet, reflects the carrying amount of unpaid loan amounts due from related parties at the balance sheet date.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher OTS

-Name Federal Regulation (FR)

-Number Title 12

-Section 563c.102

-Paragraph 8

-Subparagraph j

-Chapter V

-Subsection I

-LegacyDoc This is a non-GAAP reference that was included in the 2009 taxonomy. It will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph e

-Article 9

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 850

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph d

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(e))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

Name:	us-gaap_LoansAndLeasesReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount included in cost of sales related to transactions with related parties incurred and recorded in the statement of operations for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section 50

-Paragraph 3

-URI http://asc.fasb.org/extlink&oid=6367646&loc=d3e18780-107790

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 3

-Subparagraph b

-Article 5

+ Details

Name:	us-gaap_RelatedPartiesAmountInCostOfSales
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Direct costs arising from transactions with related parties who are not affiliates or joint Ventures. These costs are categorized as cost of goods sold.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 57

-Paragraph 2

-Subparagraph c

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.4-08.(k)(1))

-URI http://asc.fasb.org/extlink&oid=6881521&loc=d3e23780-122690

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph k

-Subparagraph 1

-Article 4

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.2)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

+ Details

Name:	us-gaap_RelatedPartyCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

+ References

No definition available.

+ Details

Name:	us-gaap_RelatedPartyTransactionRate
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Related Party Transactions (Details Textual)	3 Months Ended		6 Months Ended
Related Party Transactions (Details Textual)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2011 CNY	Dec. 31, 2009 USD ($)
Related Party Transactions (Textual)
Transaction cost related to sale and repurchase of raw material				$ 1,100,000	7,500,000
Purchase of raw materials from Related Party	79,413	948,146	714,022	1,059,091
Sub-contracts with related parties	2,597,793	2,458,327	5,423,363	3,998,745
Service fee in percentage of export sales manufactured overseas			3.00%
Service fee in percentage of export sales manufactured in China			1.00%
Related party, account settlement period, minimum			60 days
Related party, account settlement period, maximum			90 days
Interest charged on net amounts due			0.50%
Interest income, Related Party	290,559	120,379	563,295	139,495
Percentage of receivables settled during period			20.80%
Loan from related party						$ 1,000,000
Loan from Related Party, Interest rate			6.00%