Trade Accounts Receivable Purchase Programs (Detail) - USD ($) $ in Millions	9 Months Ended
Mar. 30, 2019	Mar. 31, 2018	Jun. 30, 2018
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount	$ 25.0
Trade Accounts Receivable Sold To Third Party	62.0	$ 81.2
Accounts Receivable Factored To Banking Institutions	$ 2.1		$ 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