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Note 5. Commitments and Contingent Liabilities - Product Warranties (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Product Warranty Liability at the beginning of the year	$ 911	$ 507	$ 329
Additions to warranty accrual (including changes in estimates)	625	721	279
Settlements made (in cash or in kind)	(915)	(317)	(101)
Product Warranty Liability at the end of the year	$ 621	$ 911	$ 507

X

- Definition

Represents the aggregate increase in the liability for accruals related to standard product warranties issued during the reporting period. Also includes the aggregate Increase or Decrease in the liability during the reporting period for accruals related to preexisting standard product warranties (including adjustments related to changes in estimates). Does not include any Increase or Decrease in the liability for accruals related to extended product warranties.

+ References

No definition available.

+ Details

Name:	ke_ProductWarrantyAccrualWarrantiesIssuedAndPreexistingIncreaseDecrease
Namespace Prefix:	ke_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount as of the balance sheet date of the aggregate standard product warranty liability. Does not include the balance for the extended product warranty liability.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph (c)(1),(c)(5)



-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

+ Details

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

X

- Definition

Represents the aggregate decrease in the liability for payments made (in cash or in kind) to satisfy claims under the terms of the standard product warranty. Does not include any Increase or Decrease in the liability for payments related to extended product warranties.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 460



-SubTopic 10



-Section 50



-Paragraph 8



-Subparagraph ((c)(2))



-URI http://asc.fasb.org/extlink&oid=6398077&loc=d3e12565-110249

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration