Trade Accounts Receivable Purchase Programs (Detail) - USD ($) $ in Millions	6 Months Ended
Dec. 31, 2016	Dec. 26, 2015	Jul. 02, 2016	Jul. 16, 2015
Receivables [Abstract]
Account Purchase Agreement Maximum Aggregate Amount				$ 20.0
Trade Accounts Receivable Sold To Third Party	$ 38.9	$ 34.8
Accounts Receivable Factored To Banking Institutions	$ 2.0		$ 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