Trade Accounts Receivable Purchase Programs (Detail) - USD ($)	3 Months Ended
Sep. 28, 2019	Sep. 26, 2020	Jun. 27, 2020
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount		$ 25,000,000.0
Trade Accounts Receivable Sold To Third Party	$ 17,800,000
Accounts Receivable Factored To Banking Institutions			$ 9,000

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