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

The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (h)(2)-(3)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

Name:	us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

Name:	us-gaap_BusinessAcquisitionsProFormaRevenue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The pro forma income (loss) from continuing operations before income taxes and noncontrolling interest as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

Name:	xon_BusinessAcquisitionProFormaIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterest
Namespace Prefix:	xon_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The pro forma net income (loss) attributable to noncontrolling interest as if the business combination or combinations had been completed at the beginning of the period.

No definition available.

Name:	xon_BusinessAcquisitionProFormaNetIncomeLossAttributabletoNoncontrollingInterest
Namespace Prefix:	xon_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The pro forma consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest, as if the business combination or combinations had been completed at the beginning of the period.

No definition available.