Trade Accounts Receivable Purchase Programs (Detail) - USD ($) $ in Millions	3 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Jun. 29, 2019
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount	$ 25.0
Trade Accounts Receivable Sold To Third Party	17.8	$ 22.2
Accounts Receivable Factored To Banking Institutions	$ 1.8		$ 1.7

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