Commitments and Contingencies (LOC Procurement Agreement) (Details) (Letter of Credit [Member], USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	6 Months Ended
Jan. 09, 2013	Jun. 30, 2013
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Letter Of Credit Procurement Agreement Entry Date		Jan. 09, 2013
Letter Of Credit Procurement Agreement Maturity Date		Jul. 09, 2014
Amount outstanding	$ 33.0
Quarterly procurement fee		9.00%
Initial procurement fee percentage		1.00%
Termination fee percentage		2.00%
Annual reimbursement fee percentage		0.65%
Shares issued for investment warrant	1,000,000
Exercise price of Investment Warrants	$ 7.31
LOC Procurement Agreement warrant expiration date		Jan. 09, 2018

Annual rate of Payee Percentage of reimbursement for fees due to the Letter of Credit Provider.

No definition available.

Name:	end_AnnualPayeeReimbursementFeePercent
Namespace Prefix:	end_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fee percentage on the outstanding amount of each letter of credit upon termination.

+ References

No definition available.

+ Details

Name:	end_FinalLetterOfCreditTerminationFeePercent
Namespace Prefix:	end_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Initial fee percentage based upon the initial outstanding amount of each letter of credit amount.

+ References

No definition available.

+ Details

Name:	end_InitialLetterOfCreditProcurementFeePercent
Namespace Prefix:	end_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

January 9, 2013 Entry Date for Letter Of Credit Procuremenht Agreement.

+ References

No definition available.

+ Details

Name:	end_LetterOfCreditProcurementAgreementEntryDate
Namespace Prefix:	end_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

July 9, 2014 Letter Of Credit Procurement Agreement Maturity Date.

+ References

No definition available.

+ Details

Name:	end_LetterOfCreditProcurementAgreementMaturityDate
Namespace Prefix:	end_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Expiration Date for the Warrants, Letter Of Credit Procurement Agreement.

+ References

No definition available.

+ Details

Name:	end_LetterOfCreditProcurementAgreementWarrantExpirationDate
Namespace Prefix:	end_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Quarterly fee percentage based upon the outstanding amount of each letter of credit.

+ References

No definition available.

+ Details

Name:	end_QuarterlyProcurementFee
Namespace Prefix:	end_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares issued under Warrant agreements.

+ References

No definition available.

+ Details

Name:	end_SharesIssuedForInvestmentWarrants
Namespace Prefix:	end_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Exercise price of the warrants.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Article 12

-Section 13

-Sentence Column A

+ Details

Name:	invest_InvestmentWarrantsExercisePrice
Namespace Prefix:	invest_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LineOfCreditFacilityLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

+ References

No definition available.

+ Details

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant