Trade Accounts Receivable Purchase Programs (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 29, 2019	Jun. 30, 2018	Jul. 16, 2015
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount			$ 25.0
Trade Accounts Receivable Sold To Third Party	$ 81.0	$ 104.7
Accounts Receivable Factored To Banking Institutions and not yet collected	$ 1.7	$ 2.0

This amount represents the amount of accounts receivable sold to third party financial institutions in relation to the company's accounts receivable factoring program.

No definition available.

Name:	ktcc_AccountsReceivableFactoredToBankingInstitutions
Namespace Prefix:	ktcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant