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Note 2. Acquisition (Policies)	6 Months Ended
	Dec. 31, 2018
Acquisition [Abstract]
Intangible Assets, Policy	Other Intangible Assets include the estimated fair values for finite-lived intangible assets acquired and are listed in the table below along with their estimated useful lives which are being amortized on a straight-line basis.

X

- Definition

Acquisition [Abstract]

+ References

No definition available.

+ Details

Name:	ke_AcquisitionAbstract
Namespace Prefix:	ke_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Disclosure of accounting policy for intangible assets. This accounting policy may address both intangible assets subject to amortization and those that are not. The following also may be disclosed: (1) a description of intangible assets (2) the estimated useful lives of those assets (3) the amortization method used (4) how the entity assesses and measures impairment of such assets (5) how future cash flows are estimated (6) how the fair values of such asset are determined.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275

Reference 2: 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=84158767&loc=d3e18780-107790

+ Details

Name:	us-gaap_GoodwillAndIntangibleAssetsIntangibleAssetsPolicy
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration