Trade Accounts Receivable Purchase Programs (Detail) - USD ($)	9 Months Ended
Mar. 28, 2020	Mar. 30, 2019	Jun. 29, 2019
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount	$ 25,000,000.0
Trade Accounts Receivable Sold To Third Party	38,600,000	$ 62,000,000.0
Accounts Receivable Factored To Banking Institutions	$ 5,000		$ 1,700,000

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