Equity (Loss) Earnings of Joint Ventures - Summarized Statements of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Jan. 01, 2023	Dec. 31, 2023	Jan. 01, 2023
Summarized statements of operations
Net sales	$ 118,532	$ 113,184	$ 253,938	$ 233,544
Cost of goods sold	105,035	105,797	221,721	213,661
Gross profit	13,497	7,387	32,217	19,883
Engineering, selling and administrative expenses	13,439	12,081	26,053	24,781
Income (loss) from operations	58	(4,694)	6,164	(4,898)
Other income, net	1,102	52	1,236	(241)
Income (loss) before provision for income taxes and non-controlling interest	1,044	(4,250)	6,886	(4,349)
Provision (benefit) for income taxes	264	(1,735)	1,651	(1,771)
Net income (loss)	780	(2,515)	5,235	(2,578)
VAST LLC | Equity Method Investment Summarized Financial Information
Summarized statements of operations
Net sales		56,953		123,099
Cost of goods sold		45,969		101,751
Gross profit		10,984		21,348
Engineering, selling and administrative expenses		9,227		17,759
Income (loss) from operations		1,757		3,589
Other income, net		386		458
Income (loss) before provision for income taxes and non-controlling interest		2,143		4,047
Provision (benefit) for income taxes		382		750
Net income (loss)		1,761		3,297
STRATTEC's share of VAST LLC net income		587		1,099
Intercompany profit elimination		1		16
STRATTEC's equity earnings of VAST LLC prior to impact of sale of VAST LLC		588		1,115
Loss on sale of VAST LLC	(4)		(269)
STRATTEC's equity (loss) earnings of VAST LLC	$ (4)	$ 588	$ (269)	$ 1,115