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Trade Accounts Receivable Purchase Programs (Detail) - USD ($) $ in Millions	9 Months Ended
	Mar. 28, 2020	Apr. 03, 2021
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount		$ 25.0
Trade Accounts Receivable Sold To Third Party	$ 38.6

X

- Definition

This amount represents the maximum amount of receivables eligible to be sold under the Account Purchase Agreement.

+ References

No definition available.

+ Details

Name:	ktcc_AccountPurchaseAgreementMaximumAggregateAmount
Namespace Prefix:	ktcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Trade Accounts Receivable Sold To Third Party

+ References

No definition available.

+ Details

Name:	ktcc_TradeAccountsReceivableSoldToThirdParty
Namespace Prefix:	ktcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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