Name:	elon_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostRecognizedShareBasedAwardsOtherThanOptions
Namespace Prefix:	elon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Employee Service Share Based Compensation Nonvested Awards Compensation Cost Reversed Share Based Awards Other than Options

No definition available.

Name:	elon_EmployeeServiceShareBasedCompensationNonvestedAwardsCompensationCostReversedShareBasedAwardsOtherthanOptions
Namespace Prefix:	elon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Fair Value of Performance Awards on Grant Date

No definition available.

Name:	elon_FairValueOfPerformanceAwardsOnGrantDate
Namespace Prefix:	elon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Fair Value of Performance Awards on Grant Date for employees who terminated

No definition available.

Name:	elon_FairValueofPerformanceAwardsonGrantDateforemployeeswhoterminated
Namespace Prefix:	elon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Grant date fair value of awards that will not vest

No definition available.

Name:	elon_Grantdatefairvalueofawardsthatwillnotvest
Namespace Prefix:	elon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Latest Probable Date of Achievement of Performance condition

No definition available.

Name:	elon_LatestProbableDateOfAchievementOfPerformanceCondition
Namespace Prefix:	elon_
Data Type:	us-types:durationStringItemType
Balance Type:	na
Period Type:	duration

The number of non-vested equity-based payment instruments with performance conditions, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

No definition available.

Name:	elon_NumberOfNonVestedEquityBasedPaymentInstrumentsWithPerformanceConditionExcludingStockOrUnitOptions
Namespace Prefix:	elon_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

No definition available.

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

Net number of non-option equity instruments granted to participants.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(1)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsGranted
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

Name:	elon_GrantDateOfAwardAxis=elon_GrantDate1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	elon_GrantDateOfAwardAxis=elon_GrantDate4Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	elon_GrantDateOfAwardAxis=elon_GrantDate7MemberMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: