Subsequent Events (Details) - Subsequent Event	Apr. 22, 2016 right $ / shares shares
Subsequent Event [Line Items]
Rights issued as common stock dividend (in right) \| right	1
Number of shares available to purchase for each right (usd per share) \| shares	0.001
Preferred stock, par value (usd per share) \| $ / shares	$ 0.01
Beneficial ownership percentage excluded from exercise of rights	4.99%

Class Of Warrant Or Right, Exclusion Of Beneficial Owners, Beneficial Ownership Percentage

No definition available.

Name:	elon_ClassOfWarrantOrRightExclusionOfBeneficialOwnersBeneficialOwnershipPercentage
Namespace Prefix:	elon_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Common Stock, Dividend, Rights Issued

+ References

No definition available.

+ Details

Name:	elon_CommonStockDividendRightsIssued
Namespace Prefix:	elon_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

Name:	us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.28)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 29
-Article 5

+ Details

Name:	us-gaap_PreferredStockParOrStatedValuePerShare
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: